Low-Complexity Generic Receiver for Burst-Mode Continuous Phase Modulation
نویسندگان
چکیده
This paper describes a low-complexity generic receiver for burst-mode continuous phase modulation. The burst consists of a continuous wave (CW) signal followed by a pseudorandom sequence and a data sequence modulated by continuous phase modulation (CPM). Joint coarse carrier frequency, phase and time synchronization is performed on the CW signal. Fine time synchronization is performed on the pseudo-random sequence part of the CPM signal. Fine carrier frequency and phase synchronization is performed on the CPM signal. Exponentiation transforms the CPM signal with modulation index h < 1/2 into a CPM signal with modulation index h = 1/2. Linear demodulation filters the synchronized signal with the first pulse of Laurent’s linear representation of CPM signals. Decision logic is applied to the filtered signal to recover the data sequence. Simulations are conducted to show the influence of the CPM parameters (modulation index, pulse length, shaping pulse, differential encoder) and the burst parameters (length of the CW signal, length of the CPM pseudo-random sequence, length of the CPM data sequence) on the different algorithms.
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