CogWave: Open-source Software Platform for Cognitive Radio Waveform Design
نویسندگان
چکیده
CogWave is a free and open-source software platform aiming at developing cognitive radio waveforms. Combining CogWave with USRP gives a rapid prototyping platform for physical layer design and algorithm validation through a realtime video, audio and text transmission. This paper presents the cognitive blind orthogonal frequency division multiplexing (OFDM) waveform implemented in the CogWave software. The cognitive blind OFDM waveform is an OFDM-based waveform divided into multiple sub-channels with a spectrum sensing algorithm to estimate the power spectral density and to determine the best sub-channel for transmission. A demonstration setup is described for the exchange of data between two computers using the CogWave software and running the cognitive blind OFDM waveform in the presence of a jammer sweeping the bandwidth used for transmission. It is observed that whenever the jammer perturbs the sub-channel used for transmission, the cognitive blind OFDM waveform is able to jump to another sub-channel while maintaining communication without a dedicated control channel.
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