Performance Analysis and FPGA Prototype of Variable Rate GO-OFDMA Baseband Transmission Scheme
To fulfill the increasing demand for high speed Variable Bit Rate (VBR) broadcast services with reliable Quality of Service, Group Orthogonal-Orthogonal Frequency Division Multiple Access (GO-OFDMA) and Variable Spreading Length Multicarrier Code Division Multiple Access transmission schemes are examined over Land Mobile Satellite (LMS) channel. This paper presents the performance analysis of aforementioned multiple access transmission schemes in terms of computation complexity, Peak-to-Average-Power-Ratio (PAPR) and the average Bit Error Rate (BER) performance over L-band LMS channel. Minimum Mean Square Equalizer (MMSE) equalizer is employed at the receiver. Based on the simulation results, GO-OFDMA stems out to be a better variable rate transmission scheme in respect of both PAPR and BER performance for higher data rate users. Further, GO-OFDMA based VBR transmitter and MMSE equalizer are prototyped on commercially available virtex5 xc5vlx110t–1ff1136 Field Programmable Gate Array (FPGA) device. A block-by-block analysis of hardware resource utilization and power dissipation for the VBR GO-OFDMA transmitter is provided. The achieved baud rate for VBR GO-OFDMA transmission scheme on FPGA is 103.874 Msps. Thus, GO-OFDMA transmission scheme could be appropriate for VBR communication over LMS channel.
KeywordsFPGA prototype LMS channel MMSE Multiple access PAPR Variable rate
This study was funded by Ministry of Electronics and Information Technology (MeitY) under the Visvesvaraya PhD Scheme.
- 2.Fazel, Khaled, & Kaiser, Stefan. (2008). Multi-carrier and spread spectrum systems: From OFDM and MC-CDMA to LTE and WiMAX. Wiley, 58(3), 758–766.Google Scholar
- 4.Cai, Xiaodong, Zhou, Shengli, & Giannakis, G. B. (2002). Group-orthogonal multi-carrier CDMA. Proceedings on MILCOM 2002, 1, 596–601.Google Scholar
- 5.Xu, Yin Lin, Weng, Jianfeng, & Le-Ngoc, Tho. (2004). Group-orthogonal OFDMA in fast time-varying frequency-selective fading environments. Conference on Vehicular Technology, 1, 488–492.Google Scholar
- 6.Po-Wei, Fu, & Chen, Kwang-Cheng. (2003). Multi-rate multi-carrier CDMA with multiuser detection for wireless multimedia communications. IEEE Conference on Wireless Communications and Networking, 1, 385–390.Google Scholar
- 7.D’Orazio, L., Panizza, M., & Sacchi, C. (2009). A multi-user multi-rate OFDMA transmission system based on orthogonal subcarrier grouping. In IEEE international conference on communications workshops, ICC workshops (pp. 1–5).Google Scholar
- 8.Agarwal, A., Mukati, V., & Kumar, P. (2015). Performance analysis of variable rate multicarrier transmission schemes over LMS channel. In IEEE international conference on electronics, computing and communication technologies (CONECCT) (pp. 1–6).Google Scholar
- 10.Kumutha, D., & Amutha Prabha, N. (2017). Hybrid STBC-PTS with enhanced artificial bee colony algorithm for PAPR reduction in MIMO-OFDM system. Journal of Ambient Intelligence and Humanized Computing, 1–17.Google Scholar
- 16.European Broadcasting Union Std. ETSI TS 102 584 V1.1.1 Digital Video Broadcasting (DVB); DVB-SH Implementation Guidelines, 2008–2012.Google Scholar
- 17.Chini, Paolo, Giambene, Giovanni, & Kota, Sastri. (2010). A survey on mobile satellite systems. International Journal of Satellite Communications and Networking, 28(1), 29–57.Google Scholar
- 22.Kourogiorgas, C., Kvicera, M., Skraparlis, D., Korinek, T., Sakarellos, V. K., Panagopoulos, A. D., et al. (2014). Modeling of first-order statistics of the MIMO dual polarized channel at 2 GHz for land mobile satellite systems under tree shadowing. IEEE Transactions on Antennas and Propagation, 62(10), 5410–5415.CrossRefzbMATHGoogle Scholar
- 25.Pearson, J. (2009). Computation of hypergeometric functions. Oxford: Worcester College, University of Oxford.Google Scholar
- 26.Lingzhi, Cao, & Beaulieu, N. C. (2005). A simple efficient method for generating independent Nakagami-m fading samples. IEEE Conference on Vehicular Technology Conference (VTC), 1, 44–47.Google Scholar
- 28.Sigman, K. (2016). The acceptance rejection method with applications. Available from: http://www.columbia.edu/~ks20/4703-Sigman/4703-07-Notes-ARM.pdf. Accessed 7 Aug 2016.