Title :
Performance analysis of asynchronous FFH-SSMA communication systems with frequency errors in Rayleigh fading channels
Author :
Joo, Jeungmin ; Kim, Kiseon
Author_Institution :
Dept. of Inf. & Commun., Kwang-Ju Inst. of Sci. & Technol., Kwangju, South Korea
Abstract :
We derive expressions for the bit error rate (BER) for an asynchronous FFH-SSMA system using a Markov hopping pattern and consider the occurrence of all possible hits by multiple interfering users for outdoor radio communications. The modulation scheme considered is the noncoherent M-ary frequency shift-keying (MFSK) with a threshold level, which is selected properly depending on channel and system conditions. The outdoor environment is described as the Rayleigh fading channel with an RMS delay spread of 10 to 25 μs. The normalized frequency error of 0.4 requires about 6 dB additional SNR compared with the perfect frequency synchronized case at BER=10-3.
Keywords :
Markov processes; Rayleigh channels; error statistics; frequency hop communication; frequency shift keying; radio links; radiofrequency interference; spread spectrum communication; synchronisation; 10 to 25 mus; BER; MFSK; Markov pattern; Rayleigh fading channels; asynchronous FFH-SSMA communication; bit error rate; fast frequency hopping; frequency errors; frequency shift-keying; frequency synchronization; multiple interfering users; outdoor radio communications; spread-spectrum multiple-access system; Frequency; Performance analysis;
Conference_Titel :
Military Communications Conference, 2001. MILCOM 2001. Communications for Network-Centric Operations: Creating the Information Force. IEEE
Print_ISBN :
0-7803-7225-5
DOI :
10.1109/MILCOM.2001.986072
