Low Complexity Receiver for Continuous Phase Modulation using 3RC-TL Phase Shaping Pulses
學年 104
學期 1
發表日期 2015-11-09
作品名稱 Low Complexity Receiver for Continuous Phase Modulation using 3RC-TL Phase Shaping Pulses
作品名稱（其他語言）
著者 Richard H.-H. Yang; Ming-Tsai Lee; Chia-Kun Lee; Shiunn-Jang Chern
作品所屬單位
出版者
會議名稱 2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)
會議地點 Nusa Dua, Bali, Indonesia
摘要 In our previous work, we presented an alternative continuous phase modulation (CPM) scheme using time-limited phase shaping pulses (PSP), named as the CPM-TL. It could achieve large coding gains over conventional CPM using time-unlimited PSP (CPM-TU) in many cases. Also, we found a useful class of binary CPM-TL schemes that employed time-limited raised cosine (RC) PSP, with pulse width equal to 3, denoted as 3RC-TL of CPM scheme. It has large coding gains over the Minimum Shift Keying (MSK) and Gaussian MSK (GMSK) that are two of most popular modulators among the family of CPM-UT scheme. The MSK and GMSK modulators of CPM-TU scheme are known to have lower complexity in receiver design and excellent power-bandwidth performance. Basically, the optimal receiver of the 3RC-TL CPM scheme requires more complexity than the MSK or GMSK (using suboptimum receiver). In this paper, we deal with the reduce-complexity problem in receiver design for the 3RC-TL of CPM-TL scheme. To do so, we decompose the CPM-TL signal into a set of pulse-amplitude modulated (PAM) waveforms, using Euler’s formula, which is different from the one suggested by Laurent in 1986. We show that the complexity of PAM-based 3RC-TL receiver can be simplified, and to be implemented with the Viterbi algorithm (VA) that contains two-PAM waveforms and two states. Similarly, we also compare with the GMSK (BT=0.25) using the PAM-based receiver, that required only one PAM waveform and two states, or two PAM waveforms and four states. We found that 3 RC-TL of CPM scheme has 2.5~3.45 dB coding gains over the GMSK with simplified PAM-based receiver.
關鍵字 Continuous phase modulation;Time-limited phase shaping pulses; PAM-based receiver;3RC-TL;MSK;GMSK;Coding gain;power-bandwidth performance
語言 en
收錄於
會議性質 國際
校內研討會地點 無
研討會時間 20151109~20151112
通訊作者 Richard H.-H. Yang
國別 IDN
公開徵稿
出版型式
出處 2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) (IEEE Explorer)