Method and apparatus for signal quality loss compensation in multiplexing transmission systems
First Claim
1. A method of feeding back received signal quality information, the method comprising:
- receiving, at a receiver, a multiplexed signal including two or more signal streams;
calculating, at the receiver, a received signal quality for the multiplexed signal as a function of two or more different stream-specific received signal qualities determined for the multiplexed signal;
determining, at the receiver, a loss parameter that represents a loss in the received signal quality for the multiplexed signal arising from the two or more different stream-specific received signal qualities, wherein the determined loss parameter is useable to compensate the calculated received signal quality for the loss;
generating, at the receiver, received signal quality information including the calculated received signal quality, or a quantized version thereof, and the loss parameter; and
transmitting, from the receiver, the received signal quality information as feedback,wherein determining the loss parameter comprises expressing effective losses in the received signal quality arising from the two or more different stream-specific received signal qualities as loss functions of multiplexed signal coding rate and generating the loss parameter as a set of parameters corresponding to a best-fitting one of the loss functions.
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Accused Products
Abstract
A wireless communication receiver receiving a multiplexed signal comprising two or more signal streams calculates a received signal quality for the multiplexed signal as a function of stream-specific received signal qualities, determines one or more loss parameters indicative of variations in the stream-specific received signal qualities, and generates quality feedback based on such information. In turn, a transmitter controls the selection of one or more transmission parameters of the multiplexed signal based on the quality feedback, such that its transmit link adaptations account for the losses in received signal quality at the receiver arising from the variations in the stream-specific received signal qualities. The quality feedback may include calculated loss values, or parameter/penalties that permit loss calculation, and the method applies to both code multiplexing and spatial multiplexing.
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Citations
51 Claims
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1. A method of feeding back received signal quality information, the method comprising:
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receiving, at a receiver, a multiplexed signal including two or more signal streams; calculating, at the receiver, a received signal quality for the multiplexed signal as a function of two or more different stream-specific received signal qualities determined for the multiplexed signal; determining, at the receiver, a loss parameter that represents a loss in the received signal quality for the multiplexed signal arising from the two or more different stream-specific received signal qualities, wherein the determined loss parameter is useable to compensate the calculated received signal quality for the loss; generating, at the receiver, received signal quality information including the calculated received signal quality, or a quantized version thereof, and the loss parameter; and transmitting, from the receiver, the received signal quality information as feedback, wherein determining the loss parameter comprises expressing effective losses in the received signal quality arising from the two or more different stream-specific received signal qualities as loss functions of multiplexed signal coding rate and generating the loss parameter as a set of parameters corresponding to a best-fitting one of the loss functions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of compensating for losses in received signal quality experienced by a receiver, the method comprising:
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transmitting, from a transmitter, a multiplexed signal including two or more signal streams; receiving, at the transmitter, received signal quality information as feedback from the receiver, the received signal quality information including a received signal quality for the multiplexed signal, or a quantized version thereof, and a loss parameter that represents a loss in the received signal quality for the multiplexed signal arising from two or more different stream-specific received signal qualities of the multiplexed signal, wherein the loss parameter is useable to compensate the received signal quality for the loss; and controlling, at the transmitter, the selection of one or more transmission parameters of the multiplexed signal based on the received signal quality and the loss parameter, wherein the loss parameter expresses effective losses in the received signal quality arising from the two or more different stream-specific received signal qualities as loss functions of multiplexed signal coding rate and includes a set of parameters corresponding to a best-fitting one of the loss functions. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 51)
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25. A multiplexing transmitter for use in a wireless communication network comprising:
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radio transmission circuits configured to transmit a multiplexed signal including two or more signal streams from the multiplexing transmitter to a receiver; one or more interface circuits configured to receive signal quality information as feedback from a receiver, the received signal quality information including a received signal quality for the multiplexed signal, or a quantized version thereof, and a loss parameter that represents a loss in the received signal quality for the multiplexed signal arising from two or more different stream-specific received signal qualities of the multiplexed signal, wherein the loss parameter is useable to compensate the received signal quality for the loss; and a control circuit configured to control the selection of one or more transmission parameters of the multiplexed signal based on the received signal quality and the loss parameter, wherein the loss parameter expresses effective losses in the received signal quality arising from the two or more different stream-specific received signal qualities as loss functions of multiplexed signal coding rate and includes a set of parameters corresponding to a best-fitting one of the loss functions. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A wireless communication receiver comprising one or more processing circuits configured to:
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receive a multiplexed signal including two or more signal streams; calculate a received signal quality for the multiplexed signal as a function of two or more different stream-specific received signal qualities determined for the multiplexed signal; determine a loss parameter that represents a loss in the received signal quality for the multiplexed signal arising from the two or more different stream-specific received signal qualities, wherein the determined loss parameter is useable to compensate the calculated received signal quality for the loss; generate received signal quality information including the calculated received signal quality, or a quantized version thereof, and the loss parameter; and transmit the received signal quality information as feedback, wherein the one or more processing circuits are configured to determine the loss parameter by expressing effective losses in the received signal quality arising from the two or more different stream-specific received signal qualities as loss functions of multiplexed signal coding rate and generating the loss parameter as a set of parameters corresponding to a best-fitting one of the loss functions. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50)
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Specification