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Method and apparatus for low complexity transmission and reception of constant or quasi-constant envelope continuous phase modulation waveforms
Method and apparatus for low complexity transmission and reception of constant or quasi-constant envelope continuous phase modulation waveforms
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机译:用于低复杂度发送和接收恒定或准恒定包络连续相位调制波形的方法和设备
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摘要
To reflect advantages of continuous phase modulation (CPM), the invention provides a low complexity transmitter and receiver to transmit and receive CPM signals and addresses a significant reduction in the CPM demodulator complexity, and is especially well-suited for large values of L, e.g., L≥3. The invention utilizes a linear filter front end as an integral part of the CPM demodulation process to reduce the ISI inherent in CPM transmit signal, and minimizes the influence of L in the reception process. To that end, the invention renders the complexity of a CPM demodulator non-exponentially dependent on L, and L only has a weak impact on the number of coefficients of the linear front end filters. Moreover, the invention provides a simple way of forming CPM signals for a digital communication transmitter using parallel Time Invariant Phase Encoders, which simplifies the production of CPM waveforms on software or hardware.
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