Systems and methods for reducing uplink resources to provide channel performance feedback for adjustment of downlink mimo channel data rates

A data rate, wireless communication system technology, applied in the field of data throughput maximization, which can solve the problems of poor CR-BLAST performance and inability to use continuous interference cancellation

Active Publication Date: 2008-04-09
QUALCOMM INC
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, it cannot take advantage of successive interference cancellation (SIC) and individually optimized rate control
Unless it is combined with highly complex iterative demodulation and decoding, the performance of CR-BLAST appears to be much worse than that of systems using SIC and separately optimized rate control

Method used

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  • Systems and methods for reducing uplink resources to provide channel performance feedback for adjustment of downlink mimo channel data rates
  • Systems and methods for reducing uplink resources to provide channel performance feedback for adjustment of downlink mimo channel data rates
  • Systems and methods for reducing uplink resources to provide channel performance feedback for adjustment of downlink mimo channel data rates

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Embodiment Construction

[0018] One or more embodiments of the present invention are described below. It should be noted that these embodiments and any other embodiments described below are exemplary and are intended to illustrate the present invention and not to limit it.

[0019] As described herein, various embodiments of the present invention include adjusting the downlink (forward link) MIMO channel by reducing the amount of uplink (reverse link) resources required to provide SNR / channel performance feedback System and method for improving the performance of the MIMO wireless communication system.

[0020] In one embodiment, a set of data streams in the base station are encoded with a corresponding data rate. The encoded data stream is then ready to be transmitted. However, each data stream in the encoded data stream is no longer transmitted through a single MIMO channel, but consecutive blocks in one frame of each encoded data stream are mixed and transmitted through different MIMO channels. That is...

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Abstract

Systems and methods for improving the performance of a MIMO wireless communication system by reducing the amount of uplink resources that are needed to provide channel performance feedback for the adjustment of data rates on the downlink MIMO channels. In one embodiment, a method comprises encoding each of a set of data streams according to corresponding data rates, permuting the data streams on a set of MIMO channels according to a full permutation of combinations, transmitting the permuted data streams, receiving the permuted data streams, decoding and determining an SNR for each of the data streams, computing a condensed SNR metric for the set of data streams, providing the condensed metric as feedback, determining a set of individual SNR metrics for the data streams based on the condensed SNR metric, and adjusting the data rates at which the data streams are encoded based on the individual SNR metrics.

Description

Technical field [0001] The present invention relates generally to wireless communication systems, and more particularly to systems and methods for reducing the amount of feedback required to select an appropriate data rate for an encoded data stream in order to maximize data throughput. Background technique [0002] The wireless communication system may include a plurality of base stations and a plurality of mobile stations. At any given moment, a particular base station may be communicating with one or more mobile stations. Generally, communication from a base station to a mobile station is called a forward link or downlink, and communication from a mobile station to a base station is called a reverse link or uplink. [0003] The data to be transmitted between the base station and the mobile station is usually encoded, transmitted by the transmitter (in the base station or mobile station), received by the receiver (in the base station or mobile station), and then decoded. The ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L1/20H04J99/00H04W16/28H04W24/10H04W28/00H04W28/06
CPCH04B7/04H04L1/0675H04B7/0632H04L1/0656H04B7/0417H04B7/0676H04W88/02H04W88/08
Inventor B-H·金
Owner QUALCOMM INC
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