The effort to spectrum exchange information also known as quantization mapping or subcarrier mapping into some bit information is quite common in reducing the use of bandwidth that information exchange is reported or sharing to the master node (MN) or neighbor. The detection of the energy level is quantizing into some bit to combat degradation performance in multipath fading reporting channel. The quantization methods were developed that could reduce bandwidth consumption by identifying the reporting SN to MN with binary decision (0, 1). The space time block coding over several OFDM sub-channels for two CR users which can exchange their decision trough a predefined protocol is also common.

Papers:

A. Marwanto, “Software Defined Radio Design for OFDM Based Spectrum Exchange Information Using Arduino UNO and X-Bee,” no. September, pp. 19–21, 2017.

A. Marwanto, S. Kamilah, S. Yusof, and M. H. Satria, “Orthogonal Frequency-Division Multiplexing-Based Cooperative Spectrum Sensing for Cognitive Radio Networks,” TELKOMNIKA, vol. 12, no. 1, 2014.

X. Song, C. Yin, D. Liu, and R. Zhang, “Spatial Throughput Characterization in Cognitive Radio Networks with Threshold-Based Opportunistic Spectrum Access,” 2013.

D. Denkovski, V. Atanasovski, L. Gavrilovska, J. Riihijaervi, and P. Maehoenen, “Reliability of a Radio Environment Map: Case of Spatial Interpolation Techniques,” 2012.