TY - JOUR
T1 - An orthogonal wavelet division multiple-access processor architecture for LTE-advanced wireless/ radio-over-fiber systems over heterogeneous networks
AU - Mahapatra, Chinmaya
AU - Leung, Victor C.M.
AU - Stouraitis, Thanos
N1 - Funding Information:
Research performed and documented in this thesis was supported by the Canadian Natural Sciences and Engineering Research Council (NSERC) through grant STPGP 396756.
PY - 2014/5
Y1 - 2014/5
N2 - The increase in internet traffic, number of users, and availability of mobile devices poses a challenge to wireless technologies. In long-term evolution (LTE) advanced system, heterogeneous networks (HetNet) using centralized coordinated multipoint (CoMP) transmitting radio over optical fibers (LTE A-ROF) have provided a feasible way of satisfying user demands. In this paper, an orthogonal wavelet division multiple-access (OWDMA) processor architecture is proposed, which is shown to be better suited to LTE advanced systems as compared to orthogonal frequency division multiple access (OFDMA) as in LTE systems 3GPP rel.8 (3GPP, http://www.3gpp.org/DynaReport/36300.htm). ROF systems are a viable alternative to satisfy large data demands hence, the performance in ROF systems is also evaluated. To validate the architecture, the circuit is designed and synthesized on a Xilinx vertex-6 field-programmable gate array (FPGA). The synthesis results show that the circuit performs with a clock period as short as 7.036 ns (i.e., a maximum clock frequency of 142.13 MHz) for transform size of 512. A pipelined version of the architecture reduces the power consumption by approximately 89%. We compare our architecture with similar available architectures for resource utilization and timing and provide performance comparison with OFDMA systems for various quality metrics of communication systems. The OWDMA architecture is found to perform better than OFDMA for bit error rate (BER) performance versus signal-to-noise ratio (SNR) in wireless channel as well as ROF media. It also gives higher throughput and mitigates the bad effect of peak-to-average-power ratio (PAPR).
AB - The increase in internet traffic, number of users, and availability of mobile devices poses a challenge to wireless technologies. In long-term evolution (LTE) advanced system, heterogeneous networks (HetNet) using centralized coordinated multipoint (CoMP) transmitting radio over optical fibers (LTE A-ROF) have provided a feasible way of satisfying user demands. In this paper, an orthogonal wavelet division multiple-access (OWDMA) processor architecture is proposed, which is shown to be better suited to LTE advanced systems as compared to orthogonal frequency division multiple access (OFDMA) as in LTE systems 3GPP rel.8 (3GPP, http://www.3gpp.org/DynaReport/36300.htm). ROF systems are a viable alternative to satisfy large data demands hence, the performance in ROF systems is also evaluated. To validate the architecture, the circuit is designed and synthesized on a Xilinx vertex-6 field-programmable gate array (FPGA). The synthesis results show that the circuit performs with a clock period as short as 7.036 ns (i.e., a maximum clock frequency of 142.13 MHz) for transform size of 512. A pipelined version of the architecture reduces the power consumption by approximately 89%. We compare our architecture with similar available architectures for resource utilization and timing and provide performance comparison with OFDMA systems for various quality metrics of communication systems. The OWDMA architecture is found to perform better than OFDMA for bit error rate (BER) performance versus signal-to-noise ratio (SNR) in wireless channel as well as ROF media. It also gives higher throughput and mitigates the bad effect of peak-to-average-power ratio (PAPR).
KW - Bit error rate (BER)
KW - Coordinated multipoint (CoMP)
KW - Heterogeneous networks (HetNet)
KW - LTE advanced radio over fiber (LTE A-ROF)
KW - Orthogonal frequency division multiple access (OFDMA)
KW - Orthogonal wavelength division multiple-access (OWDMA) processor
KW - Peak-to-average-power ratio (PAPR)
KW - Signal-to-noise ratio (SNR)
KW - Xilinx vertex 6 FPGA
UR - http://www.scopus.com/inward/record.url?scp=84904500312&partnerID=8YFLogxK
U2 - 10.1186/1687-6180-2014-77
DO - 10.1186/1687-6180-2014-77
M3 - Article
AN - SCOPUS:84904500312
SN - 1687-6172
VL - 2014
JO - Eurasip Journal on Advances in Signal Processing
JF - Eurasip Journal on Advances in Signal Processing
IS - 1
M1 - 77
ER -