Title :
BER analysis of direct conversion OFDM systems with MRC under channel estimation errors
Author :
López-Martínez, F. Javier ; Martos-Naya, Eduardo ; Paris, José F. ; Entrambasaguas, J. Tomá
Author_Institution :
Dipt. Ing. de Comun., Univ. de Malaga, Malaga, Spain
fDate :
5/1/2010 12:00:00 AM
Abstract :
In this letter, we calculate an exact closed-form expression for the bit error rate (BER) of orthogonal frequency division multiplexing (OFDM) systems with direct conversion that employ maximal ratio combining (MRC) reception in multipath Rayleigh fading channels, using binary phase-shitf keying (BPSK) modulation. We assume a realistic system model where direct current (DC) offset, carrier frequency offset (CFO) and imperfect channel state information (ICSI) are simultaneously considered. Results show the appearance of an irreducible BER floor due to DC offset and ICSI. As a rule of thumb, we provide a simple expression for the maximum DC offset allowable in a direct conversion receiver.
Keywords :
OFDM modulation; Rayleigh channels; channel estimation; diversity reception; multipath channels; phase shift keying; radio receivers; BER analysis; BPSK modulation; CFO; DC offset; ICSI; MRC reception; binary phase-shitf keying modulation; bit error rate; carrier frequency offset; channel estimation errors; closed-form expression; direct conversion OFDM systems; direct conversion receiver; direct current offset; imperfect channel state information; irreducible BER floor; maximal ratio combining reception; multipath Rayleigh fading channels; orthogonal frequency division multiplexing systems; realistic system model; Binary phase shift keying; Bit error rate; Channel estimation; Channel state information; Closed-form solution; Diversity reception; Fading; OFDM modulation; Phase modulation; Thumb; Orthogonal frequency division multiplexing, DC offset, carrier frequency offset, channel estimation error, bit error rate;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2010.05.092257
