TY - GEN
T1 - BER performance of chirp QPSK in multipath channel
AU - Feng, Zhi Cheng
AU - An, Jian Ping
PY - 2011
Y1 - 2011
N2 - Chirp signal can be modulated to transmit digital data. We investigated quadrature phase shift keying (QPSK) modulation for chirp signals and analyzed the bit error rate (BER) performance in multipath fading channel. In receiver, synchronous demodulation is used to demodulate received chirp signal, and the output of multipath signal in matched filter has two factors to interfere with the decision vector of direct signal. When the initial frequency equals to the frequency deviation during a half symbol duration, and the chirp rate is negative slope, the output of multipath signal in matched filter has the same phase or the reverse phase as that of direct signal, the impact of multipath signal on BER performance of demodulation is alleviated. Finally, numerical simulation results show the effectiveness of the scheme for mitigating multipath interference.
AB - Chirp signal can be modulated to transmit digital data. We investigated quadrature phase shift keying (QPSK) modulation for chirp signals and analyzed the bit error rate (BER) performance in multipath fading channel. In receiver, synchronous demodulation is used to demodulate received chirp signal, and the output of multipath signal in matched filter has two factors to interfere with the decision vector of direct signal. When the initial frequency equals to the frequency deviation during a half symbol duration, and the chirp rate is negative slope, the output of multipath signal in matched filter has the same phase or the reverse phase as that of direct signal, the impact of multipath signal on BER performance of demodulation is alleviated. Finally, numerical simulation results show the effectiveness of the scheme for mitigating multipath interference.
KW - bit error rate
KW - chirp
KW - multipath interference
KW - quadrature phase shift keying
UR - http://www.scopus.com/inward/record.url?scp=81455148174&partnerID=8YFLogxK
U2 - 10.1109/ICECC.2011.6066430
DO - 10.1109/ICECC.2011.6066430
M3 - Conference contribution
AN - SCOPUS:81455148174
SN - 9781457703218
T3 - 2011 International Conference on Electronics, Communications and Control, ICECC 2011 - Proceedings
SP - 1349
EP - 1352
BT - 2011 International Conference on Electronics, Communications and Control, ICECC 2011 - Proceedings
T2 - 2011 International Conference on Electronics, Communications and Control, ICECC 2011
Y2 - 9 September 2011 through 11 September 2011
ER -