Method and wireless systems using multiple antennas and adaptive control for maximizing a communication parameter
First Claim
1. A method of maximizing a communication parameter of a channel 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 the following steps:
- a) processing said data to produce parallel spatial-multiplexed streams SMi, where i=1 . . . k;
b) mapping said spatial-multiplexed streams SMi to transmit signals TSp, where p=1 . . . M, for transmission from said M transmit antennas to said receiver via said channel, wherein the mapping comprises processing each of said spatial-multiplexed streams SMi by a coding unit to produce coded streams CSh, where h=1 . . . k′
;
c) receiving receive signals RSj, where j=1 . . . N by said N receive antennas;
d) assessing a quality parameter of said receive signals RSj;
e) using said quality parameter to adjust k to maximize said communication parameter of said channel; and
f) using said quality parameter in said transmit unit to adjust k′
.
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Accused Products
Abstract
A method of maximizing a communication parameter, such as data capacity, signal quality or throughput of a channel between a transmit unit with M transmit antennas and a receive unit with N receive antennas and a communication system such as a wireless network (including networks with multiple access techniques such as TDMA, FDMA, CDMA, OFDMA) employing the method. The data is first processed to produce parallel spatial-multiplexed streams SMi, where i=1 . . . k, which are converted or mapped to transmit signals TSp, where p=1 . . . M, assigned for transmission from the M transmit antennas. Corresponding receive signals RSj, where j=1 . . . N, are received by the N receive antennas of the receiver and used to assess a quality parameter, such as a statistical signal parameter including SINR, SNR, power level, level crossing rate, level crossing duration of the signal of a predetermined threshold and reception threshold, or a parameter of the data, such as BER or packet error rate. The quality parameter is used to adaptively adjust k as well as other parameters such as coding and mapping to transmit antennas such that the communication parameter of the channel is maximized.
652 Citations
31 Claims
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1. A method of maximizing a communication parameter of a channel 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 the following steps:
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a) processing said data to produce parallel spatial-multiplexed streams SMi, where i=1 . . . k;
b) mapping said spatial-multiplexed streams SMi to transmit signals TSp, where p=1 . . . M, for transmission from said M transmit antennas to said receiver via said channel, wherein the mapping comprises processing each of said spatial-multiplexed streams SMi by a coding unit to produce coded streams CSh, where h=1 . . . k′
;
c) receiving receive signals RSj, where j=1 . . . N by said N receive antennas;
d) assessing a quality parameter of said receive signals RSj;
e) using said quality parameter to adjust k to maximize said communication parameter of said channel; and
f) using said quality parameter in said transmit unit to adjust k′
.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A communication system with an adaptively maximized communication parameter of a channel in which data is transmitted 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 comprising:
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a) processing means for processing said data to produce parallel spatial-multiplexed streams SMi, where i=1 . . . k;
b) antenna mapping means for converting said spatial-multiplexed streams SMi to transmit signals TSp, where p=1 . . . M, and transmitting said transmit signals TSp from said M transmit antennas via said channel;
said receive unit receiving receive signals RSj, where j=1 . . . N, and said communication system comprising;
a) means for assessing a quality parameter of said receive signals RSj;
b) means for adjusting k based on said quality parameter to maximize said communication parameter of said channel; and
c) an adaptive controller in communication with said processing means and said antenna mapping means, said adaptive controller adjusting said processing means and said antenna mapping means based on said quality parameter. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification