TY - GEN
T1 - A frequency hopping spread spectrum transmission scheme for uncoordinated cognitive radios
AU - Li, Xiaohua
AU - Hwu, Juite
PY - 2009
Y1 - 2009
N2 - One of the major challenges to cognitive radios is the synchronization of distributed radios onto the same spectrum white spaces which vary in time and space. In this paper, we propose a frequency-hopping spread spectrum transmission scheme which works reliably without any a priori handshaking assumption. Each cognitive radio independently detects white spaces, and then selects one of them to transmit or receive signals according to a pre-defined frequency hopping pattern. While exploiting the reliability of the white space detection capability of cognitive radios, the new scheme is robust to even large detection errors. According to the accuracy of the spectrum sensing, both the secondary data rate and the interference to primary users can be optimized by adjusting the spreading gain. Its performance is analyzed and demonstrated by simulations.
AB - One of the major challenges to cognitive radios is the synchronization of distributed radios onto the same spectrum white spaces which vary in time and space. In this paper, we propose a frequency-hopping spread spectrum transmission scheme which works reliably without any a priori handshaking assumption. Each cognitive radio independently detects white spaces, and then selects one of them to transmit or receive signals according to a pre-defined frequency hopping pattern. While exploiting the reliability of the white space detection capability of cognitive radios, the new scheme is robust to even large detection errors. According to the accuracy of the spectrum sensing, both the secondary data rate and the interference to primary users can be optimized by adjusting the spreading gain. Its performance is analyzed and demonstrated by simulations.
KW - Cognitive radio
KW - Dynamic spectrum access
KW - Frequency hopping
KW - Frequency shift keying
KW - Synchronization
UR - https://www.scopus.com/pages/publications/70349195952
U2 - 10.1109/ICASSP.2009.4960091
DO - 10.1109/ICASSP.2009.4960091
M3 - Conference contribution
SN - 9781424423545
T3 - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
SP - 2345
EP - 2348
BT - 2009 IEEE International Conference on Acoustics, Speech, and Signal Processing - Proceedings, ICASSP 2009
T2 - 2009 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2009
Y2 - 19 April 2009 through 24 April 2009
ER -