OFDM Based High Data Rate, Fading Resilient Transceiver for Wireless Networks-on-Chip
Sri Harsha Gade, Sakshi Garg, Sujay Deb · 2017
On-chip wireless links operating at millimeter wave frequencies offer the most promising solution to overcome the multi-hop latency and high power consumption of metal interconnects in Network-on-Chip (NoC) platforms. Design of efficient transceivers, that are resilient to channel effects is essential to achieve high performance on-chip wireless communication. In this work, we present a spectrally efficient Orthogonal Frequency Division Multiplexing (OFDM) based transceiver, operating at mm-wave frequencies for on-chip wireless interconnects. The design targets to provide high data rate with low area and power overheads, while handling channel effects and inter symbol interference. It achieves data rate of 195.32Gbps at 0.132pJ/bit using 256 orthogonal subchannels and transmission bandwidth of 25 GHz. The area occupied is 0.092mm2 using 32 nm technology. The system level evaluation of 64 core Wireless NoC (WNoC) with proposed OFDM scheme provides 42% and 61.6% reduction respectively in latency and energy as compared to wired mesh topology.