| 带宽有效包络恒定的连续相位QPSK调制 |
| |
| 引用本文： | 林永照,吴成柯,刘学文.带宽有效包络恒定的连续相位QPSK调制[J].系统工程与电子技术,2008,30(5):806-809. |
| |
| 作者姓名： | 林永照 吴成柯 刘学文 |
| |
| 作者单位： | 西安电子科技大学ISN国家重点实验室,陕西,西安,710071 |
| |
| 摘 要： | 针对导致传统QPSK信号带宽效率和功率效率低的相位跳变问题,提出了连续相位QPSK,CPQPSK调制。在将QPSK表示为连续相位调制CPM基础上,得出了QPSK的差分码编码规则,对其频率脉冲进行整形得到连续相位QPSK。理论分析证明CPQPSK信号具有恒定包络。仿真结果表明CPQPSK的带宽效率在同等情况下要高于SOQPSK,而抗误码性能与后者几乎完全相同。
|
| 关 键 词： | 连续相位调制 恒定包络 带宽效率 脉冲整形方法 |
| 文章编号： | 1001-506X(2008)05-0806-04 |
| 修稿时间： | 2007年4月26日 |
Bandwidth efficient constant envelope continuous phase QPSK modulation |
| |
| LIN Yong-zhao,WU Cheng-ke,LIU Xue-wen.Bandwidth efficient constant envelope continuous phase QPSK modulation[J].System Engineering and Electronics,2008,30(5):806-809. |
| |
| Authors: | LIN Yong-zhao WU Cheng-ke LIU Xue-wen |
| |
| Abstract: | To improve the bandwidth and power efficiency of conventional QPSK signal,the continuous phase QPSK(CPQPSK) is proposed.Based on representing QPSK as continuous phase modulation(CPM),a differential coding rule for QPSK is concluded.The novel modulation scheme is deduced by introducing frequency pulse shaping into conventional QPSK.Theoretical analysis proves that CPQPSK signal has constant envelope.Simulation results show that CPQPSK signal has higher bandwidth efficiency than shaped offset OQPSK(SOQPSK) signal under same constraints and has almost the same bit error rate(BER) as the latter. |
| |
| Keywords: | continuous phase modulation constant envelope bandwidth efficiency pulse shaping methods |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
