Transmission performance analysis of VSF-OFCDM broadband packet wireless access based on field experiments in 100-MHz forward link

The paper presents field experiments on the throughput performance of a shared packet data channel over 100 Mbps using a variable spreading factor-orthogonal frequency and code division multiplexing (VSF-OFCDM) transceiver with a 100-MHz bandwidth in a real multipath fading channel. The field experiments employed a base station (BS) with a 120-degree sectored beam antenna with an antenna height of 50 m; a van equipped with a mobile station (MS) was driven at an average speed of 30 km/h along measurement courses that are approximately 800 to 1000 m away from the BS, mostly under non-line-of-sight conditions. The field experiments applied an adaptive modulation and coding (AMC) scheme with QPSK, 16QAM, and 64QAM and punctured turbo coding together with two-branch antenna diversity reception. The results show that throughput values of over 100 and 200 Mbps are achieved for the average received signal-to-interference-plus-noise power ratios (SINR) of approximately 6.0 and 14.0 dB, respectively. Furthermore, the location probability for achieving throughput over 100 and 200 Mbps becomes approximately 90% and 20% in these measurement courses, which experience a large number of paths, when the transmission power of the BS is 10 W with a 120-degree sectored beam transmission.