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1. (WO2010123937) METHODS AND APPARATUS FOR CONTROL SIGNALING IN A COMMUNICATION SYSTEM

Pub. No.:    WO/2010/123937    International Application No.:    PCT/US2010/031803
Publication Date: Fri Oct 29 01:59:59 CEST 2010 International Filing Date: Wed Apr 21 01:59:59 CEST 2010
IPC: H04B 7/06
H04L 1/00
Applicants: QUALCOMM INCORPORATED
TSAI, Ming-Chang
JIANG, Yibo
SAMBHWANI, Sharad Deepak
Inventors: TSAI, Ming-Chang
JIANG, Yibo
SAMBHWANI, Sharad Deepak
Title: METHODS AND APPARATUS FOR CONTROL SIGNALING IN A COMMUNICATION SYSTEM
Abstract:
Methods and apparatus for control signaling in a communication system using continuous valued measurement and feedback are disclosed. The control signaling utilizes delta-sigma modulation where a measured phase or amplitude of a received signal is used to determine a difference signal by subtracting a previously quantized integrated difference signal from the current measurement signal, and then integrating the difference signal. The integrated difference signal is quantized and transmitted to the device originating the received signal as feedback control signaling. The device originating the received signal may then filter the control signaling to obtain the desired control information used to adjust or control the transmission of the signal transmitted by the device. By utilizing delta-sigma modulation, a greater degree of control signaling precision is achieved when controlling variables such as phase or amplitude of the transmitted signals, thereby achieving improved communication system performance.