Patent ID: 6661834
Filing Date: 2003-12-09
Classification: H04B,H04L

Abstract:
Carrier recovery control circuitry for a spread spectrum receiver to control the oscillators driving complex carrier recovery mixers based on a phase error derived from the difference between recovered and ideal phase values associated with received symbols, said control circuitry comprising:a. a first phase accumulator configured to add the phase error from a prior symbol to the phase error of a current symbol and provide a first accumulated output at a symbol rate; b. division circuitry configured to divide the phase error of the current symbol by a number of samples per symbol and provide a divided error signal at a sample rate; and c. a second phase accumulator configured to accumulate the divided error signal at the sample rate and to provide a phase correction signal dependent on the accumulation of the divided error signal at the sample rate and the first accumulated output, wherein the phase correction signal adjusts the operating frequency of the complex carrier recovery mixers to track the carrier of a received signal.