Simplified Implementation of Software-Defined Radio Based SOQPSK Demodulators
This paper introduces new schemes of softwaredefined radio (SDR) based shaped offset quadrature phase-shift keying (SOQPSK) demodulators. Current synchronizations for linear modulations are not always applicable since the data symbols in SOQPSK are correlated. By close loop delay-andmultiply carrier frequency recovery, maximum likelihood estimate (MLE) based carrier phase and timing recovery and simplified detection of SOQPSK with 2-state trellis, the schemes of the all digital SOQPSK-MIL and SOQPSK-TG demodulators are suggested. From numeric simulations, our schemes can obtain good performance within just 0.8 dB of ideal performance at an additive Gaussian white noise (AWGN) channel. Moreover, the implementations of the simplified 2-state trellis based SOQPSK detectors have very low complexity. Therefore, it can be used to implement SOQPSK demodulator applied in military or aeronautical telemetry field.
SOQPSK software-defined radio joint carrier and timing recovery mazimum likelihood estimate Viterbi detection
Jianrong Bao Yafeng Zhan Jianhua Lu
Department of Electronic Engineering, Tsinghua University, Beijing, China
国际会议
第一届软件无线电技术研讨会(ist International Software Ridio Technology Workshop)
北京
英文
1-5
2008-10-16（万方平台首次上网日期，不代表论文的发表时间）