Improving the Performance in Delta Sigma Modulator Transmitter

One of the major drawbacks in using delta sigma modulator (DSM)-transmitters is a large amount ofquantization noise at the output of DSM which results on low efficiency for transmitter. In this paper the efficiency ofDSM-transmitter is improved by reducing quantization noise from the DSM output signal while the signal to noise anddistortion ratio (SNDR) is maintained. Simulation results show that by this technique and for ۱.۹۲ MHz long termevolution (LTE) input signal with oversampling ratio (OSR) of ۱۶, the coding efficiency (CE) of DSM is improved from۹.۷% to ۲۳% while the SNDR is around ۴۱dB.