Title :
A low complexity packet detection algorithm for a CPM modem
Author :
Penrod, Ryan ; Fitz, Michael P. ; Zhu, Weijun ; Takeshita, Oscar
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
Abstract :
This paper discusses the design of a packet detection algorithm for a burst mode continuous phase modulation (CPM) modem over flat Rayleigh fading channels in the 220 MHz frequency band. The modem design focuses on bandwidth efficiency while maintaining good synchronization performance and low complexity. The packet structure meets the Federal Communications Commission frequency emission mask for the 220 MHz frequency band. The packet detection algorithm uses a degraded maximum likelihood (ML) amplitude estimate to provide the initial timing needed for synchronization and demodulation. The ML amplitude estimate is shown to be a function of a one dimensional parameter search. The parameter search is degraded to reduce complexity while maintaining an accurate amplitude estimate.
Keywords :
Rayleigh channels; continuous phase modulation; maximum likelihood detection; maximum likelihood estimation; modems; synchronisation; 220 MHz; CPM modem; Federal Communications Commission; burst mode continuous phase modulation; demodulation; flat Rayleigh fading channel; maximum likelihood amplitude estimation; packet detection algorithm; synchronization; Algorithm design and analysis; Amplitude estimation; Bandwidth; Continuous phase modulation; Degradation; Detection algorithms; Fading; Frequency synchronization; Maximum likelihood estimation; Modems;
Conference_Titel :
Signals, Systems and Computers, 2004. Conference Record of the Thirty-Eighth Asilomar Conference on
Print_ISBN :
0-7803-8622-1
DOI :
10.1109/ACSSC.2004.1399303