US5914932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Communication method and receiving apparatus
Assignee: Sony Corp
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Filing: 1997-12-24
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Granted: 1999-06-22
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Expires: 2017-12-24
Abstract
Abstract A reception method of a multicarrier system according to the present invention is one in which a phase-modulated data is transmitted by using each of a plurality of subcarriers, and includes a random data generating step of generating a phase shift data randomly changed, a multiplying step for multiplying each of received subcarriers with an output obtained in the random data generating step, and a state detection signal generating step for monitoring a state of an output obtained in the multiplying step and for generating a predetermined state detection signal when a predetermined state is detected. A frame period of a received signal is detected based on an output obtained in the state detection signal generating step.
Inventors
- 👤 Mitsuhiro Suzuki
- 👤 Kazuyuki Sakoda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:25
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/26; H04L27/2601; H04L27/2647; H04L27/2655; H04L27/2656; H04L27/2657; H04L27/2668; H04L27/2673; H04L27/2676; H04L27/2679
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
172 words
A reception method of a multicarrier system in which phase-modulated data is transmitted by using each of a plurality of subcarriers, comprising: a random data generating step of generating phase shift data that is randomly changed and supplying the randomly changed phase shift data as an output of said random data generating step; a multiplying step for multiplying each of received subcarriers with respective ones of the output of said random data generating step and supplying a result of the multiplication as an output of said multiplying step; a state detection signal generating step for monitoring a state of the output of said multiplying step and for generating as an output of said state detection generation step a predetermined state detection signal when a predetermined state is detected; and a frame period detecting step for detecting a frame period by detecting a frame position in a received signal based on the output of said state detection signal generating step, wherein a frame period is a time elapsed between transitions between successive frames.
Claim 2
Dependent Claim
172 words
A reception method of a multicarrier system in which phase-modulated data is transmitted by using each of a plurality of subcarriers, comprising: a random data generating step of generating phase shift data that is randomly changed and supplying the randomly changed phase shift data as an output of said random data generating step; a multiplying step for multiplying each of received subcarriers with respective ones of the output of said random data generating step and supplying a result of the multiplication as an output of said multiplying step; a state detection signal generating step for monitoring a state of the output of said multiplying step and for generating as an output of said state detection generation step a predetermined state detection signal when a predetermined state is detected; and a frame period detecting step for detecting a frame period by detecting a frame position in a received signal based on the output of said state detection signal generating step, wherein a frame period is a time elapsed between transitions between successive frames.
Claim 3
Dependent Claim
172 words
A reception method of a multicarrier system in which phase-modulated data is transmitted by using each of a plurality of subcarriers, comprising: a random data generating step of generating phase shift data that is randomly changed and supplying the phase shift data as an output of said random data generating step; a multiplying step for multiplying each of received subcarriers with respective ones of the output of said random data generating step and supplying a result of the multiplication as an output of said multiplying step; a state detection signal generating step for monitoring a state of the output of said multiplying step and for generating as an output of said state detection signal generating step a predetermined state detection signal when a predetermined state is detected; and a frame period detecting step for detecting a reference timing representing a position of a frame of a received signal based on the output of said state detection signal generating step, wherein a frame period is a time elapsed between transitions between successive frames.
Claim 4
Dependent Claim
172 words
A reception method of a multicarrier system in which phase-modulated data is transmitted by using each of a plurality of subcarriers, comprising: a random data generating step of generating phase shift data that is randomly changed and supplying the phase shift data as an output of said random data generating step; a multiplying step for multiplying each of received subcarriers with respective ones of the output of said random data generating step and supplying a result of the multiplication as an output of said multiplying step; a state detection signal generating step for monitoring a state of the output of said multiplying step and for generating as an output of said state detection signal generating step a predetermined state detection signal when a predetermined state is detected; and a frame period detecting step for detecting a reference timing representing a position of a frame of a received signal based on the output of said state detection signal generating step, wherein a frame period is a time elapsed between transitions between successive frames.
Claim 5
Dependent Claim
27 words
A reception method according to claim 1, further comprising the step of delaying each of said received subcarrier signals in said multiplying step by a predetermined time.
Claim 6
Dependent Claim
27 words
A reception method according to claim 2, further comprising the step of delaying each of said received subcarrier signals in said multiplying step by a predetermined time.
Claim 7
Dependent Claim
182 words
A reception apparatus for a multicarrier system in which phase-modulated data is transmitted by using each of a plurality of subcarriers, comprising: a demodulation unit for demodulating a received signal of a multicarrier system and supplying the demodulated signal as an output of said demodulation unit; a random data generating unit for generating phase shift data that is randomly changed and supplying the phase shift data as an output of said random data generating unit; a multiplying unit for multiplying the output from said demodulation unit with the output from said random data generating unit and supplying a result of the multiplication as an output of said multiplying unit; a state detection signal generating unit for monitoring a state of the output from said multiplying unit and for generating a predetermined state detection signal when a predetermined state is detected; and means for detecting a frame period by detecting a position of a frame in a received signal based on the output from said state detection signal generating unit, wherein a frame period is a time elapsed between transitions between successive frames.
Claim 8
Dependent Claim
182 words
A reception apparatus for a multicarrier system in which phase-modulated data is transmitted by using each of a plurality of subcarriers, comprising: a demodulation unit for demodulating a received signal of a multicarrier system and supplying the demodulated signal as an output of said demodulation unit; a random data generating unit for generating phase shift data that is randomly changed and supplying the phase shift data as an output of said random data generating unit; a multiplying unit for multiplying the output from said demodulation unit with the output from said random data generating unit and supplying a result of the multiplication as an output of said multiplying unit; a state detection signal generating unit for monitoring a state of the output from said multiplying unit and for generating a predetermined state detection signal when a predetermined state is detected; and means for detecting a frame period by detecting a position of a frame in a received signal based on the output from said state detection signal generating unit, wherein a frame period is a time elapsed between transitions between successive frames.
Claim 9
Dependent Claim
175 words
A reception apparatus for a multicarrier system in which phase-modulated data is transmitted by using each of a plurality of subcarriers, comprising: a demodulation unit for demodulating a received signal of a multicarrier system and supplying the demodulated signal as an output of said demodulation unit; a random data generating unit for generating phase shift data that is randomly changed and supplying the phase shift data as an output of said random data generating unit; a multiplying unit for multiplying the output from said demodulation unit with the output from said random data generating unit and supplying a result of the multiplication as an output of said multiplying unit; a state detection signal generating unit for monitoring a state of the output from said multiplying unit and for generating a predetermined state detection signal as an output of said state detection signal generating unit when a predetermined state is detected; and means for detecting a reference timing in a frame of a received signal based on the output from said state detection signal generating unit.
Claim 10
Dependent Claim
175 words
A reception apparatus for a multicarrier system in which phase-modulated data is transmitted by using each of a plurality of subcarriers, comprising: a demodulation unit for demodulating a received signal of a multicarrier system and supplying the demodulated signal as an output of said demodulation unit; a random data generating unit for generating phase shift data that is randomly changed and supplying the phase shift data as an output of said random data generating unit; a multiplying unit for multiplying the output from said demodulation unit with the output from said random data generating unit and supplying a result of the multiplication as an output of said multiplying unit; a state detection signal generating unit for monitoring a state of the output from said multiplying unit and for generating a predetermined state detection signal as an output of said state detection signal generating unit when a predetermined state is detected; and means for detecting a reference timing in a frame of a received signal based on the output from said state detection signal generating unit.
Claim 11
Dependent Claim
35 words
A reception apparatus according to claim 5, further comprising: a signal delaying unit for delaying the output from said demodulation unit by a predetermined time and then supplying the delayed output to said multiplying unit.
Claim 12
Dependent Claim
35 words
A reception apparatus according to claim 6, further comprising: a signal delaying unit for delaying the output from said demodulation unit by a predetermined time and then supplying the delayed output to said multiplying unit.
References Cited (Backward Citations)
US5541552A
Cited
US5694415A
Cited
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