Codebook Selection Strategies in Long-range Sub-1 GHz WLANs

摘要: The new long-range WLANs will enable a simple and cost-efficient setup of wireless ambient systems, including smart city grid communication networks. emerging IEEE 802.11ah WLAN standard utilizes carrier frequencies at 900 MHz in the ISM-band facilitates multi-antenna MIMO-OFDM. In order to further increase coverage, precoding selection strategies are proposed analyzed. Grassmannian Kerdock manifold focus this study due their simplicity effectiveness. Whereas may provide an optimal codeword distance, man- ifold has been found be more effective its reduced quantized codewords combined with increased SNR. Simulation studies as well real-world evaluation results indicate 2-3 dB gains when is applied, thus increasing coverage. codebooks have evaluated SDR-based prototype.