Methods and apparatus for power allocation and/or rate selection for ul mimo/simo operations with par considerations

A rate and power value technology, applied in the field of power adjustment mechanism, can solve problems such as high signal distortion
CN101536352AActive Publication Date: 2009-09-16QUALCOMM INC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
QUALCOMM INC
Publication Date
2009-09-16

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Abstract

A method for a wireless communication includes receiving or storing a peak to average (PAR) back off value; and applying the PAR back off value to determine the transmission power and rate for SIMO and MIMO transmissions. In one aspect, the PAR back off value is at least partially based on modulation type. In another aspect, the PAR back off value is more for higher order QAM than for QPSK. The power allocation algorithm for different UL MIMO schemes is described as follows. For MIMO without antenna permutation (e.g. per antenna rate control), different PAR back off values are considered for different data streams. For MIMO with antenna permutation or other unitary transformation such as virtual antenna mapping or precoding, the PAR back off are determined based on combined channel. The transmission data rate depends on power and also the receiver algorithms such as a MMSE receiver or MMSE-SIC receiver.
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Description

[0001] Cross References to Related Applications

[0002] This patent application claims priority to US Provisional Patent Application No. 60 / 864,573, filed November 6, 2006, entitled "A METHOD ANDAPPARATUS FOR POWER ALLOCATION AND RATE SELECTION FORUL MIMO / SIMO OPERATIONS WITH PAR CONSIDERATIONS." The foregoing application is hereby incorporated by reference in its entirety. technical field

[0003] The following description relates generally to wireless communications and, more specifically, to providing mechanisms for power adjustment. Background technique

[0004] Wireless communication systems are widely deployed to provide various communication content such as voice, data, and so on. A typical wireless communication system may be a multiple-access system capable of supporting communication with multiple users by sharing available system resources (such as bandwidth, transmission power...). Examples of such multiple-access systems may include: Code Division Multiple Ac...

Claims

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