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1. (WO2012102733) COGNITIVE RADIO SPECTRUM SENSING VIA CDMA RECEIVER CODING

Pub. No.:    WO/2012/102733    International Application No.:    PCT/US2011/023029
Publication Date: Aug 2, 2012 International Filing Date: Jan 28, 2011
IPC: H04W 16/14
H04W 28/16
H04W 72/02
Applicants: EMPIRE TECHNOLOGY DEVELOPMENT, LLC
KRUGLICK, Ezekiel
Inventors: KRUGLICK, Ezekiel
Title: COGNITIVE RADIO SPECTRUM SENSING VIA CDMA RECEIVER CODING
Abstract:
Technologies are generally described for cognitive radio spectrum sensing via Code Division Multiple Access (CDMA) receiver coding. A CDMA module in the front-end of a cognitive radio system may be used to sense spectrum. When the system is not decoding or transmitting signals, a modified CDMA receiver coding may replace a pseudorandom code used in decoding with relatively pure, non-random detection frequency to scan for energy from primary users of the spectrum. Multiplication of the received signal by spectrally pure codes in place of the CDMA code renders the CDMA processor effectively a scanning spectrum analyzer and may detect energy at multiple frequencies. The allocation of sub-bands and/or timing may be adjusted to account for the detected energy.