Patent ID: 7088764
Filing Date: 2006-08-08
Classification: H03M,H04B,H04L

Abstract:
1. In a spread spectrum communication station capable of simultaneously receiving multiple data channels on the same frequency spectrum and at data rates in which the data rate of at least one of the data channels may vary, a method for determining signal quality based on signal to noise ratio (SNR) for at least one of the channels, the method comprising: introducing data for processing; performing forward error-correcting coding, QPSK modulation, and quadrature signal spreading on the signal; despreading the data; delaying a sample of the despread data a sufficient period to allow a predetermined decoding process to decode the information; decoding the data with the predetermined decoding process; comparing the delayed despread data with the decoded data; and using the comparison of the delayed despread data with the decoded data as an indication of SNR.