US6823181B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Universal platform for software defined radio
Assignee: Sony Deutschland GmbH
•
Filing: 2000-07-07
•
Granted: 2004-11-23
•
Expires: 2020-07-07
Abstract
Abstract The universal platform for the SDR of the present invention employs the direct conversion approach with the n-port MMIC followed by reconfigurable reprogrammable devices such as DSP's or FPGA's. The universal platform is based on the linear operation of the devices. Thus, the DC offset problem may be solved. It is also possible to support very wide bandwidths compared with conventional I/Q receivers. Therefore, the present universal platform is suitable for multimode and multiband communications.
Inventors
- 👤 Ryuji Kohno
- 👤 Masayoshi Abe
- 👤 Noboru Sasho
- 👤 Shinichiro Haruyama
- 👤 Robert Henry Morelos-Zaragoza
- 👤 Francis Swarts
- 👤 Pieter Van Rooyen
- 👤 Yukitoshi Sanada
- 👤 Lachlan Bruce Michael
- 👤 Hamid Amir-Alikhani
- 👤 Veselin Brankovic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:59
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/30; H03; H03D; H03D1/00; H03D1/22; H03D1/2245; H04L; H04L27/00; H04L27/18; H04L27/22; H04L27/227; H04L27/2271; H04L27/2273; H04L27/233; H04L27/2332
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
240 words
A universal platform for software defined radio, comprising: an n (n being an integer of 3 or more)-port receiver including a first input terminal receiving a received signal, a second input terminal receiving a local signal, a plurality of power detectors for receiving a plurality of input power signals and generating a plurality of power-detected output signals, a directional coupler coupled to the first input terminal and a first power detector of said plurality of power detectors, said directional coupler operating to directionally couple said received signal to said first power detector, said directional coupler generating a first output signal at least first and second dividers said first divider coupled to said directional coupler and a second power detector of said plurality of power detectors and operating to divide the first output signal said first divider generating a second output signal, said second divider coupled to said second input terminal and a third power detector of said plurality of power detectors, and operating to divide the local signal, said second divider generating a third output signal, and a phase shifter coupled to said at least first and second dividers, said phase shifter operating to shift the phase of said second output signal or the phase of said third output signal; and a converter for converting the power-detected output signals of said plurality of power detectors to a plurality of signal components included in the received signal or the local signal.
Claim 2
Dependent Claim
240 words
A universal platform for software defined radio, comprising: an n (n being an integer of 3 or more)-port receiver including a first input terminal receiving a received signal, a second input terminal receiving a local signal, a plurality of power detectors for receiving a plurality of input power signals and generating a plurality of power-detected output signals, a directional coupler coupled to the first input terminal and a first power detector of said plurality of power detectors, said directional coupler operating to directionally couple said received signal to said first power detector, said directional coupler generating a first output signal at least first and second dividers said first divider coupled to said directional coupler and a second power detector of said plurality of power detectors and operating to divide the first output signal said first divider generating a second output signal, said second divider coupled to said second input terminal and a third power detector of said plurality of power detectors, and operating to divide the local signal, said second divider generating a third output signal, and a phase shifter coupled to said at least first and second dividers, said phase shifter operating to shift the phase of said second output signal or the phase of said third output signal; and a converter for converting the power-detected output signals of said plurality of power detectors to a plurality of signal components included in the received signal or the local signal.
Claim 3
Dependent Claim
214 words
A universal platform for software defined radio as set forth in claim 1 , wherein the power detector comprises: a first field effect transistor receiving one of said plurality of input power signals at its gate, a second field effect transistor with a source connected to a source of the first field effect transistor, a first gate bias supplying circuit for supplying a gate bias voltage to the gate of the first field effect transistor, a second gate bias supplying circuit for supplying a gate bias voltage to a gate of the second field effect transistor, a current source connected to the sources of the first field effect transistor and the second field effect transistor, a drain bias supplying circuit for supplying a drain bias voltage to the drains of the first field effect transistor and the second field effect transistor, a first capacitor connected between the drain of the first field effect transistor and a reference potential, and a second capacitor connected between the drain of the second field effect transistor and the reference potential, and the voltage difference between a first drain voltage at the drain of the first field effect transistor and a second drain voltage at the drain of the second field effect transistor is processed as a detection output.
Claim 4
Dependent Claim
126 words
A universal platform for software defined radio as set forth in claim 2 , wherein the first field effect transistor and the second field effect transistor have substantially equivalent characteristics, the drain bias supplying circuit includes a first drain bias use resistance element connected between the drain of the first field effect transistor and a voltage source and a second drain bias use resistance element connected between the drain of the second field effect transistor and a voltage source, a resistance of the first drain bias use resistance element and a resistance of the second drain bias use resistance element are set to substantially equivalent values, and a capacitance of the first capacitor and a capacitance of the second capacitor are set to substantially equivalent values.
Claim 5
Dependent Claim
153 words
A universal platform for software defined radio as set forth in claim 2 , wherein when a gate width of the first field effect transistor is W ga and a gate width of the second field effect transistor is W gb , the ratio W ga /W gb is set to N, the drain bias supplying circuit includes a first drain bias use resistance element connected between the drain of the first field effect transistor and a voltage source and a second drain bias use resistance element connected between the drain of the second field effect transistor and a voltage source, a resistance Ra of the first drain bias use resistance element and a resistance of the second drain bias use resistance Rb element are set so as to satisfy the condition Ra/Rb=1/N, and a capacitance of the first capacitor and a capacitance of the second capacitor are set to substantially equivalent values.
Claim 6
Dependent Claim
194 words
A universal platform for software defined radio as set forth in claim 1 , wherein the power detector comprises; a first field effect transistor receiving the input signal at its gate and with a source connected to a reference potential; a second field effect transistor with a source connected to the reference potential; a first gate bias supplying circuit for supplying a gate bias voltage to the gate of the first field effect transistor; a second gate bias supplying circuit for supplying a gate bias voltage to a gate of the second field effect transistor; a drain bias supplying circuit for supplying a drain bias voltage to the drains of the first field effect transistor and the second field effect transistor; a first capacitor connected between the drain of the first field effect transistor and a reference potential; and a second capacitor connected between the drain of the second field effect transistor and the reference potential, wherein the voltage difference between a first drain voltage at the drain of the first field effect transistor and a second drain voltage at the drain of the second field effect transistor is processed as a detection output.
Claim 7
Dependent Claim
30 words
A universal platform for software defined radio as set forth in claim 2 , wherein the first field effect transistor and the second field effect transistor have substantially equivalent characteristics.
Claim 8
Dependent Claim
64 words
A universal platform for software defined radio as set forth in claim 2 , wherein the drain bias supplying circuit includes a first drain bias use resistance element connected between the drain of the first field effect transistor and a voltage source and a second drain bias use resistance element connected between the drain of the second field effect transistor and a voltage source.
Claim 9
Dependent Claim
42 words
A universal platform for software defined radio as set forth in claim 2 , wherein a resistance of the first drain bias use resistance element and a resistance of the second drain bias use resistance element are set to substantially equivalent values.
Claim 10
Dependent Claim
34 words
A universal platform for software defined radio as set forth in claim 2 , wherein a capacitance of the first capacitor and a capacitance of the second capacitor are set to substantially equivalent values.
Claim 11
Dependent Claim
52 words
A universal platform for software defined radio as set forth in claim 2 , wherein when a gate width of the first field effect transistor is W ga and a gate width of the second field effect transistor is W gb , the ratio W ga /W gb is set to N.
Claim 12
Dependent Claim
64 words
A universal platform for software defined radio as set forth in claim 2 , wherein the drain bias supplying circuit includes a first drain bias use resistance element connected between the drain of the first field effect transistor and a voltage source and a second drain bias use resistance element connected between the drain of the second field effect transistor and a voltage source.
Claim 13
Dependent Claim
47 words
A universal platform for software defined radio as set forth in claim 2 , wherein a resistance Ra of the first drain bias use resistance element and a resistance of the second drain bias use resistance Rb element are set so as to satisfy the condition Ra/Rb=1/N.
Claim 14
Dependent Claim
34 words
A universal platform for software defined radio as set forth in claim 2 , wherein a capacitance of the first capacitor and a capacitance of the second capacitor are set to substantially equivalent values.
Claim 15
Dependent Claim
269 words
A universal platform for software defined radio, comprising: an n (n being an integer of 3 or more)-port receiver including: a first input terminal receiving a received signal, a second input terminal receiving a local signal, a plurality of power detectors for receiving a plurality of input power signals and generating a plurality of analog power-detected output signals a directional coupler coupled to the first input terminal and a first power detector of said plurality of power detectors said directional coupler operating to directionally couple said received signal to said first power detector, said directional coupler generating a first output signal, at least first and second dividers, said first divider coupled to said directional coupler and a second power detector of said plurality of power detectors, and operating to divide the first output signal, said first divider generating a second output signal, said second divider coupled to said second input terminal and a third power detector of said plurality of power detectors, and operating to divide the local signal, said second divider generating a third output signal, and a phase shifter coupled to said at least first and second dividers, said phase shifter operating to shift the phase of said second output signal or the phase of said third output signal; at least one analog-to-digital (A/D) converter for converting the output analog power-detected output signal from a corresponding power detector to a digital signal; and a digital signal processing part for converting the power-detected output signal of the power detector through the A/D converter to a plurality of signal components included in the received signal or the local signal.
Claim 16
Dependent Claim
269 words
A universal platform for software defined radio, comprising: an n (n being an integer of 3 or more)-port receiver including: a first input terminal receiving a received signal, a second input terminal receiving a local signal, a plurality of power detectors for receiving a plurality of input power signals and generating a plurality of analog power-detected output signals a directional coupler coupled to the first input terminal and a first power detector of said plurality of power detectors said directional coupler operating to directionally couple said received signal to said first power detector, said directional coupler generating a first output signal, at least first and second dividers, said first divider coupled to said directional coupler and a second power detector of said plurality of power detectors, and operating to divide the first output signal, said first divider generating a second output signal, said second divider coupled to said second input terminal and a third power detector of said plurality of power detectors, and operating to divide the local signal, said second divider generating a third output signal, and a phase shifter coupled to said at least first and second dividers, said phase shifter operating to shift the phase of said second output signal or the phase of said third output signal; at least one analog-to-digital (A/D) converter for converting the output analog power-detected output signal from a corresponding power detector to a digital signal; and a digital signal processing part for converting the power-detected output signal of the power detector through the A/D converter to a plurality of signal components included in the received signal or the local signal.
Claim 17
Dependent Claim
28 words
A universal platform for software defined radio as set forth in claim 14 , wherein the digital signal processing part compensates for the non-linearity of the power detector.
Claim 18
Dependent Claim
214 words
A universal platform for software defined radio as set forth in claim 14 , wherein: the power detector comprises: a first field effect transistor receiving one of said plurality of input power signals at its gate, a second field effect transistor with a source connected to a source of the first field effect transistor, a first gate bias supplying circuit for supplying a gate bias voltage to the gate of the first field effect transistor, a second gate bias supplying circuit for supplying a gate bias voltage to a gate of the second field effect transistor, a current source connected to the sources of the first field effect transistor and the second field effect transistor, a drain bias supplying circuit for supplying a drain bias voltage to the drains of the first field effect transistor and the second field effect transistor, a first capacitor connected between the drain of the first field effect transistor and a reference potential, and a second capacitor connected between the drain of the second field effect transistor and the reference potential, and the voltage difference between a first drain voltage at the drain of the first field effect transistor and a second drain voltage at the drain of the second field effect transistor is processed as a detection output.
Claim 19
Dependent Claim
126 words
A universal platform for software defined radio as set forth in claim 16 , wherein: the first field effect transistor and the second field effect transistor have substantially equivalent characteristics, the drain bias supplying circuit includes a first drain bias use resistance element connected between the drain of the first field effect transistor and a voltage source and a second drain bias use resistance element connected between the drain of the second field effect transistor and a voltage source, a resistance of the first drain bias use resistance element and a resistance of the second drain bias use resistance element are set to substantially equivalent values, and a capacitance of the first capacitor and a capacitance of the second capacitor are set to substantially equivalent values.
Claim 20
Dependent Claim
153 words
A universal platform for software defined radio as set forth in claim 16 , wherein: when a gate width of the first field effect transistor is W ga and a gate width of the second field effect transistor is W gb , the ratio W ga /W gb is set to N, the drain bias supplying circuit includes a first drain bias use resistance element connected between the drain of the first field effect transistor and a voltage source and a second drain bias use resistance element connected between the drain of the second field effect transistor and a voltage source, a resistance Ra of the first drain bias use resistance element and a resistance of the second drain bias use resistance Rb element are set so as to satisfy the condition Ra/Rb=1/N, and a capacitance of the first capacitor and a capacitance of the second capacitor are set to substantially equivalent values.
Claim 21
Dependent Claim
30 words
A universal platform for software defined radio as set forth in claim 16 , wherein the first field effect transistor and the second field effect transistor have substantially equivalent characteristics.
Claim 22
Dependent Claim
64 words
A universal platform for software defined radio as set forth in claim 16 , wherein the drain bias supplying circuit includes a first drain bias use resistance element connected between the drain of the first field effect transistor and a voltage source and a second drain bias use resistance element connected between the drain of the second field effect transistor and a voltage source.
Claim 23
Dependent Claim
42 words
A universal platform for software defined radio as set forth in claim 16 , wherein a resistance of the first drain bias use resistance element and a resistance of the second drain bias use resistance element are set to substantially equivalent values.
Claim 24
Dependent Claim
34 words
A universal platform for software defined radio as set forth in claim 16 , wherein a capacitance of the first capacitor and a capacitance of the second capacitor are set to substantially equivalent values.
Claim 25
Dependent Claim
52 words
A universal platform for software defined radio as set forth in claim 16 , wherein when a gate width of the first field effect transistor is W ga and a gate width of the second field effect transistor is W gb , the ratio W ga /W gb is set to N.
Claim 26
Dependent Claim
64 words
A universal platform for software defined radio as set forth in claim 16 , wherein the drain bias supplying circuit includes a first drain bias use resistance element connected between the drain of the first field effect transistor and a voltage source and a second drain bias use resistance element connected between the drain of the second field effect transistor and a voltage source.
Claim 27
Dependent Claim
47 words
A universal platform for software defined radio as set forth in claim 16 , wherein a resistance Ra of the first drain bias use resistance element and a resistance of the second drain bias use resistance Rb element are set so as to satisfy the condition Ra/Rb=1/N.
Claim 28
Dependent Claim
34 words
A universal platform for software defined radio as set forth in claim 16 , wherein a capacitance of the first capacitor and a capacitance of the second capacitor are set to substantially equivalent values.
Claim 29
Dependent Claim
194 words
A universal platform for software defined radio as set forth in claim 14 , wherein the power detector comprises: a first field effect transistor receiving the input signal at its gate and with a source connected to a reference potential; a second field effect transistor with a source connected to the reference potential; a first gate bias supplying circuit for supplying a gate bias voltage to the gate of the first field effect transistor; a second gate bias supplying circuit for supplying a gate bias voltage to a gate of the second field effect transistor; a drain bias supplying circuit for supplying a drain bias voltage to the drains of the first field effect transistor and the second field effect transistor; a first capacitor connected between the drain of the first field effect transistor and a reference potential; and a second capacitor connected between the drain of the second field effect transistor and the reference potential, wherein the voltage difference between a first drain voltage at the drain of the first field effect transistor and a second drain voltage at the drain of the second field effect transistor is processed as a detection output.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2007-11-23 | 2008-05-24 | 2008-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-11-23 | 2012-05-24 | 2012-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-11-23 | 2016-05-24 | 2016-11-23 | $7700.00 | Window Closed / Lapsed |