US6298092B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of controlling communication parameters of wireless systems
Assignee: Intel Corp
•
Filing: 2000-06-02
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Granted: 2001-10-02
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Expires: 2020-06-02
Abstract
Abstract The present invention provides a method for controlling a communication parameter in a channel through which data is transmitted between a transmit unit with M transmit antennas and a receive unit with N receive antennas by selecting from among proposed mapping schemes an applied mapping scheme according to which the data is converted into symbols and assigned to transmit signals TS p , p=1 . . . M, which are transmitted from the M transmit antennas. The selection of the mapping scheme is based on a metric; in one embodiment the metric is a minimum Euclidean distance d min,rx of the symbols when received, in another embodiment the metric is a probability of error P(e) in the symbol when received. The method can be employed in communication systems using multi-antenna transmit and receive units of various types including wireless systems, e.g., cellular communication systems, using multiple access techniques such as TDMA, FDMA, CDMA and OFDMA.
Inventors
- 👤 Robert W. Heath, Jr.
- 👤 Peroor K. Sebastian
- 👤 Arogyaswami J. Paulraj
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:39
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/0001; H04L1/0023; H04L1/0026; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/24; H01Q1/241; H01Q1/246; H01Q3/00; H01Q3/26; H01Q3/2605; H04B; H04B7/00; H04B7/02; H04B7/04; H04B7/06; H04B7/0613; H04B7/0667; H04B7/0669; H04B7/0697; H04B7/08; H04B7/0837; H04B7/084; H04B7/0842; H04B7/0848; H04B7/0857; H04B7/0891; H04L1/0002; H04L1/0003; H04L1/0009; H04L1/0015; H04L1/0016; H04L1/02; H04L1/06; H04L1/0618; H04B7/0673; H04L1/0606
Claims Analysis
Total Claims: 59
Claim 1
Independent Claim
132 words
A method of controlling a communication parameter of a channel for transmitting data between a transmit unit having a number M of transmit antennas and a receive unit having a number N of receive antennas, said method comprising: a) providing proposed mapping schemes for converting said data into symbols and assigning said data to transmit signals TS p , where p=1 . . . M, for transmission from said M transmit antennas; b) obtaining a measurement of said channel at said receiver; c) using said measurement to compute for each of said proposed mapping schemes a minimum Euclidean distance d min,rx of said symbols when received; and d) selecting an applied mapping scheme from said proposed mapping schemes based on said minimum Euclidean distance d min,rx , thereby controlling said communication parameter.
Claim 2
Independent Claim
132 words
A method of controlling a communication parameter of a channel for transmitting data between a transmit unit having a number M of transmit antennas and a receive unit having a number N of receive antennas, said method comprising: a) providing proposed mapping schemes for converting said data into symbols and assigning said data to transmit signals TS p , where p=1 . . . M, for transmission from said M transmit antennas; b) obtaining a measurement of said channel at said receiver; c) using said measurement to compute for each of said proposed mapping schemes a minimum Euclidean distance d min,rx of said symbols when received; and d) selecting an applied mapping scheme from said proposed mapping schemes based on said minimum Euclidean distance d min,rx , thereby controlling said communication parameter.
Claim 3
Dependent Claim
32 words
The method of claim 1 , wherein said proposed mapping schemes comprise modulating said data in a constellation selected from the group consisting of PSK, QAM, GMSK, FSK, PAM, PPM, CAP, CPM.
Claim 4
Dependent Claim
19 words
The method of claim 1 , wherein said proposed mapping schemes comprise coding said data at predetermined coding rates.
Claim 5
Dependent Claim
27 words
The method of claim 1 , wherein said proposed mapping schemes comprise at least one method selected from the group consisting of diversity coding and spatial multiplexing.
Claim 6
Dependent Claim
23 words
The method of claim 4 , wherein said at least one method comprises diversity coding of order k ranging from 1 to M.
Claim 7
Dependent Claim
33 words
The method of claim 5 , wherein said diversity coding is selected from the techniques consisting of space-time block coding, transmit antenna selection, Equal Gain Combining, Maximum Ratio Combining and delay diversity coding.
Claim 8
Dependent Claim
29 words
The method of claim 5 , wherein said proposed mapping scheme comprises a random assignment of said transmit signals TS p to a number k of said M antennas.
Claim 9
Dependent Claim
38 words
The method of claim 5 , wherein said proposed mapping scheme comprises an assignment of said transmit signals TS p to a number k of said M antennas based on a required minimum Euclidean distance d min,required .
Claim 10
Dependent Claim
23 words
The method of claim 8 , wherein said required minimum Euclidean distance d min,required is related to a quality parameter of said data.
Claim 11
Dependent Claim
23 words
The method of claim 4 , wherein said at least one method comprises spatial multiplexing of order k ranging from 1 to M.
Claim 12
Dependent Claim
28 words
The method of claim 10 , wherein said spatial multiplexing comprises a random assignment of said transmit signals TS p to a number k of said M antennas.
Claim 13
Dependent Claim
37 words
The method of claim 10 , wherein said spatial multiplexing comprises an assignment of said transmit signals TS p to a number k of said M antennas based on a required minimum Euclidean distance d min,required .
Claim 14
Dependent Claim
23 words
The method of claim 12 , wherein said required minimum Euclidean distance d min,required is related to a quality parameter of said data.
Claim 15
Dependent Claim
33 words
The method of claim 10 , wherein said receive unit is selected from the group consisting of maximum likelihood receivers, zero forcing equalizer receivers, successive cancellation receivers and minimum mean square error receivers.
Claim 16
Dependent Claim
23 words
The method of claim 1 , wherein a minimum Euclidean distance d min,tx of said symbols when transmitted is stored in a database.
Claim 17
Dependent Claim
27 words
The method of claim 15 , wherein said database is located in a unit selected from the group consisting of said transmit unit and said receive unit.
Claim 18
Dependent Claim
25 words
The method of claim 1 , wherein said communication parameter is selected from the group consisting of data capacity, signal quality, spectral efficiency and throughput.
Claim 19
Dependent Claim
38 words
The method of claim 1 , further comprising: a) determining a quality parameter of said data; b) establishing a relation between said quality parameter and a required minimum Euclidean distance d min,required necessary to satisfy said quality parameter.
Claim 20
Dependent Claim
42 words
The method of claim 18 , wherein said quality parameter is selected from the group consisting of signal-to-interference noise ratio, signal-to-noise ratio, power level, level crossing rate, level crossing duration, bit error rate, symbol error rate, packet error rate, and error probability.
Claim 21
Dependent Claim
34 words
The method of claim 1 , wherein said transmit unit and said receive unit operate in accordance with at least one multiple access technique selected from the group consisting of TDMA, FDMA, CDMA, OFDMA.
Claim 22
Dependent Claim
36 words
The method of claim 20 , wherein said proposed mapping schemes comprise diversity coding selected from the group consisting of space-time block coding, transmit antenna selection, Equal Gain Combining, Maximum Ratio Combining and delay diversity coding.
Claim 23
Independent Claim
129 words
A method of controlling a communication parameter of a channel for transmitting data between a transmit unit having a number M of transmit antennas and a receive unit having a number N of receive antennas, said method comprising: a) providing proposed mapping schemes for converting said data into symbols and assigning said data to transmit signals TS p , where p=1 . . . M, for transmission from said M transmit antennas; b) obtaining a measurement of said channel at said receiver; c) using said measurement to compute for each of said proposed mapping schemes a probability of error P(e) in said symbols when received; and d) selecting an applied mapping scheme from said proposed mapping schemes based on said probability of error P(e), thereby controlling said communication parameter.
Claim 24
Independent Claim
129 words
A method of controlling a communication parameter of a channel for transmitting data between a transmit unit having a number M of transmit antennas and a receive unit having a number N of receive antennas, said method comprising: a) providing proposed mapping schemes for converting said data into symbols and assigning said data to transmit signals TS p , where p=1 . . . M, for transmission from said M transmit antennas; b) obtaining a measurement of said channel at said receiver; c) using said measurement to compute for each of said proposed mapping schemes a probability of error P(e) in said symbols when received; and d) selecting an applied mapping scheme from said proposed mapping schemes based on said probability of error P(e), thereby controlling said communication parameter.
Claim 25
Dependent Claim
32 words
The method of claim 22 , wherein said proposed mapping schemes comprise modulating said data in a constellation selected from the group consisting of PSK, QAM, GMSK, FSK, PAM, PPM, CAP, CPM.
Claim 26
Dependent Claim
19 words
The method of claim 22 , wherein said proposed mapping schemes comprise coding said data at predetermined coding rates.
Claim 27
Dependent Claim
27 words
The method of claim 22 , wherein said proposed mapping schemes comprise at least one method selected from the group consisting of diversity coding and spatial multiplexing.
Claim 28
Dependent Claim
23 words
The method of claim 25 , wherein said at least one method comprises diversity coding of order k ranging from 1 to M.
Claim 29
Dependent Claim
33 words
The method of claim 26 , wherein said diversity coding is selected from the techniques consisting of space-time block coding, transmit antenna selection, Equal Gain Combining, Maximum Ratio Combining and delay diversity coding.
Claim 30
Dependent Claim
29 words
The method of claim 26 , wherein said proposed mapping scheme comprises a random assignment of said transmit signals TS p to a number k of said M antennas.
Claim 31
Dependent Claim
38 words
The method of claim 26 , wherein said proposed mapping scheme comprises an assignment of said transmit signals TS p to a number k of said M antennas based on a required probability of error P(e) req .
Claim 32
Dependent Claim
23 words
The method of claim 25 , wherein said at least one method comprises spatial multiplexing of order k ranging from 1 to M.
Claim 33
Dependent Claim
28 words
The method of claim 30 , wherein said spatial multiplexing comprises a random assignment of said transmit signals TS p to a number k of said M antennas.
Claim 34
Dependent Claim
37 words
The method of claim 30 , wherein said spatial multiplexing comprises an assignment of said transmit signals TS p to a number k of said M antennas based on a required probability of error P(e) req .
Claim 35
Dependent Claim
33 words
The method of claim 30 , wherein said receive unit is selected from the group consisting of maximum likelihood receivers, zero forcing equalizer receivers, successive cancellation receivers and minimum mean square error receivers.
Claim 36
Dependent Claim
23 words
The method of claim 22 , wherein a minimum Euclidean distance d min,tx of said symbols when transmitted is stored in a database.
Claim 37
Dependent Claim
27 words
The method of claim 34 , wherein said database is located in a unit selected from the group consisting of said transmit unit and said receive unit.
Claim 38
Dependent Claim
25 words
The method of claim 22 , wherein said communication parameter is selected from the group consisting of data capacity, signal quality, spectral efficiency and throughput.
Claim 39
Dependent Claim
34 words
The method of claim 22 , wherein said transmit unit and said receive unit operate in accordance with at least one multiple access technique selected from the group consisting of TDMA, FDMA, CDMA, OFDMA.
Claim 40
Dependent Claim
36 words
The method of claim 37 , wherein said proposed mapping schemes comprise diversity coding selected from the group consisting of space-time block coding, transmit antenna selection, Equal Gain Combining, Maximum Ratio Combining and delay diversity coding.
Claim 41
Dependent Claim
162 words
A communication system with a controlled communication parameter of a channel for transmitting data between a transmit unit having a number M of transmit antennas and a receive unit having a number N of receive antennas, said transmit unit having a mapping circuit comprising: a) a conversion unit for converting said data into symbols; b) an assigning unit for assigning said data to transmit signals TS p , where p=1 . . . M, for transmission from said M transmit antennas, said converting and said assigning being in accordance with proposed mapping schemes; said receive unit comprising: a) a channel estimator for obtaining a measurement of said channel; b) a computing block for computing for each of said proposed mapping schemes a minimum Euclidean distance d min,rx of said symbols when received; and c) a selection block for selecting an applied mapping scheme from said proposed mapping schemes based on said minimum Euclidean distance d min,rx , thereby controlling said communication parameter.
Claim 42
Dependent Claim
162 words
A communication system with a controlled communication parameter of a channel for transmitting data between a transmit unit having a number M of transmit antennas and a receive unit having a number N of receive antennas, said transmit unit having a mapping circuit comprising: a) a conversion unit for converting said data into symbols; b) an assigning unit for assigning said data to transmit signals TS p , where p=1 . . . M, for transmission from said M transmit antennas, said converting and said assigning being in accordance with proposed mapping schemes; said receive unit comprising: a) a channel estimator for obtaining a measurement of said channel; b) a computing block for computing for each of said proposed mapping schemes a minimum Euclidean distance d min,rx of said symbols when received; and c) a selection block for selecting an applied mapping scheme from said proposed mapping schemes based on said minimum Euclidean distance d min,rx , thereby controlling said communication parameter.
Claim 43
Dependent Claim
21 words
The communication system of claim 39 , wherein said assigning unit comprises a diversity coding block and a spatial multiplexing block.
Claim 44
Dependent Claim
47 words
The communication system of claim 40 , wherein said diversity coding block comprises at least one block selected from the group consisting of a space-time coding block, a transmit antenna selection block, Equal Gain Channel coding block, Maximum Ratio Channel coding block and delay diversity coding block.
Claim 45
Dependent Claim
34 words
The communication system of claim 40 , wherein said receive unit is selected from the group consisting of maximum likelihood receivers, zero forcing equalizer receivers, successive cancellation receivers and minimum mean square error receivers.
Claim 46
Dependent Claim
24 words
The communication system of claim 39 , further comprising a database for storing a minimum Euclidean distance d min,tx for said symbols when transmitted.
Claim 47
Dependent Claim
29 words
The communication system of claim 39 , wherein said computing block is selected from the group consisting of blocks for computing data capacity, signal quality, spectral efficiency and throughput.
Claim 48
Dependent Claim
57 words
The communication system of claim 44 , further comprising a quality parameter computation block for determining a quality parameter of said data, said quality parameter being selected from the group consisting of signal-to-interference noise ratio, signal-to-noise ratio, power level, level crossing rate, level crossing duration, bit error rate, symbol error rate, packet error rate, and error probability.
Claim 49
Dependent Claim
29 words
The communication system of claim 45 , further comprising an assessment block for establishing a correlation between said quality parameter and a required minimum Euclidean distance d min,required .
Claim 50
Dependent Claim
30 words
The communication system of claim 39 , said communication system operating in accordance with at least one multiple access technique selected from the group consisting of TDMA, FDMA, CDMA, OFDMA.
Claim 51
Dependent Claim
159 words
A communication system with a controlled communication parameter of a channel for transmitting data between a transmit unit having a number M of transmit antennas and a receive unit having a number N of receive antennas, said transmit unit having a mapping circuit comprising: a) a conversion unit for converting said data into symbols; b) an assigning unit for assigning said data to transmit signals TS p , where p=1 . . . M, for transmission from said M transmit antennas, said converting and said assigning being in accordance with proposed mapping schemes; said receive unit comprising: a) a channel estimator for obtaining a measurement of said channel; b) a computing block for computing for each of said proposed mapping schemes a probability of error P(e) of said symbols when received; and c) a selection block for selecting an applied mapping scheme from said proposed mapping schemes based on said probability of error P(e), thereby controlling said communication parameter.
Claim 52
Dependent Claim
159 words
A communication system with a controlled communication parameter of a channel for transmitting data between a transmit unit having a number M of transmit antennas and a receive unit having a number N of receive antennas, said transmit unit having a mapping circuit comprising: a) a conversion unit for converting said data into symbols; b) an assigning unit for assigning said data to transmit signals TS p , where p=1 . . . M, for transmission from said M transmit antennas, said converting and said assigning being in accordance with proposed mapping schemes; said receive unit comprising: a) a channel estimator for obtaining a measurement of said channel; b) a computing block for computing for each of said proposed mapping schemes a probability of error P(e) of said symbols when received; and c) a selection block for selecting an applied mapping scheme from said proposed mapping schemes based on said probability of error P(e), thereby controlling said communication parameter.
Claim 53
Dependent Claim
21 words
The communication system of claim 48 , wherein said assigning unit comprises a diversity coding block and a spatial multiplexing block.
Claim 54
Dependent Claim
34 words
The communication system of claim 49 , wherein said receive unit is selected from the group consisting of maximum likelihood receivers, zero forcing equalizer receivers, successive cancellation receivers and minimum mean square error receivers.
Claim 55
Dependent Claim
47 words
The communication system of claim 48 , wherein said diversity coding block comprises at least one block selected from the group consisting of a space-time coding block, a transmit antenna selection block, Equal Gain Channel coding block, Maximum Ratio Channel coding block and delay diversity coding block.
Claim 56
Dependent Claim
21 words
The communication system of claim 48 , further comprising a database for storing a required probability of error P(e) req .
Claim 57
Dependent Claim
29 words
The communication system of claim 48 , wherein said computing block is selected from the group consisting of blocks for computing data capacity, signal quality, spectral efficiency and throughput.
Claim 58
Dependent Claim
57 words
The communication system of claim 53 , further comprising a quality parameter computation block for determining a quality parameter of said data, said quality parameter being selected from the group consisting of signal-to-interference noise ratio, signal-to-noise ratio, power level, level crossing rate, level crossing duration, bit error rate, symbol error rate, packet error rate, and error probability.
Claim 59
Dependent Claim
30 words
The communication system of claim 48 , said communication system operating in accordance with at least one multiple access technique selected from the group consisting of TDMA, FDMA, CDMA, OFDMA.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2004-10-01 | 2005-04-02 | 2005-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-10-01 | 2009-04-02 | 2009-10-02 | $3760.00 | Window Closed / Lapsed |
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