Patent ID: 8401108
Filing Date: 2013-03-19
Classification: H03C,H03D

Abstract:
1. A method of modulating symbol data, the method comprising: processing unmodulated digital symbol data to form a stream of modulated digital symbol data having a symbol rate; filtering the stream of modulated digital symbol data to form a substantially band-limited complex sample stream having a bandwidth of less than twice the symbol rate and with a sample rate of less than twice the symbol rate; and converting the substantially band-limited complex sample stream into an analog signal, wherein the processing the unmodulated digital symbol data produces the stream of modulated digital symbol data at a sample rate equal to N times the symbol rate of the stream of modulated digital symbol data, wherein N is a positive integer, and the filtering the stream of modulated digital symbol data comprises decimating the stream of modulated digital symbol data by a rate of M/N, wherein M is a positive integer, M is not equal to N, and the rate of M/N is a non-integer value.