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Avoidance of Discontinuities When Switching Between Modulation Schemes

机译:避免在调制方案之间切换时出现间断

摘要

Modulator system (1) comprising modulators (2, 3, 4) for modulating input signals (A) according to different modulation schemes (8PSK, GMSK) cause discontinuities in the output signals (F) when switching between the schemes. By providing the modulator systems (1) with compensators (13, 22-26) for compensating amplitudes/phases of the output signals (F) of the modulator system (1) for discontinuities, these discontinuities resulting from modulation scheme changes are reduced to a large extent. This may be done before/after the pulse shapers (11, 21). The compensators (13, 22-26) comprise multipliers for multiplying pulse shaped modulated signals with complex valued waveforms (E), or for multiplying modulated signals with waveforms (S, T), or for multiplying complex valued signals (B, C, D) with complex valued phase offsets (X, Y, Z), which complex valued signals (B, C, D) are to be multiplied with mapped input signals. As a result, the output signals (F) and/or power amplifiers (33) situated after the modulator system (1) no longer need to be ramped down.
机译:包含用于根据不同调制方案(8PSK,GMSK)调制输入信号(A)的调制器( 2、3、4 )的调制器系统( 1 )会导致输出不连续在方案之间切换时,信号(F)。通过为调制器系统( 1 )提供补偿器( 13、22 - 26 )来补偿输出信号(F)的幅度/相位对于不连续性,在调制器系统( 1 )中,由于调制方案的变化而导致的这些不连续性在很大程度上得以减少。这可以在脉冲整形器( 11,21 )之前/之后进行。补偿器( 13,22 - 26 )包括乘法器,用于将脉冲状调制信号与复数值波形(E)相乘,或用于将调制信号与波形(S,T ),或将具有复数值相位偏移(X,Y,Z)的复数值信号(B,C,D)相乘,这些复数值信号(B,C,D)将与映射的输入信号相乘。结果,位于调制器系统( 1 )之后的输出信号(F)和/或功率放大器( 33 )不再需要降低。

著录项

  • 公开/公告号US2009015344A1

    专利类型

  • 公开/公告日2009-01-15

    原文格式PDF

  • 申请/专利权人 ALEXANDER LAMPE;RAINER DIETSCH;

    申请/专利号US20040581804

  • 发明设计人 ALEXANDER LAMPE;RAINER DIETSCH;

    申请日2004-11-24

  • 分类号H03K7/10;

  • 国家 US

  • 入库时间 2022-08-21 19:33:41

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