Performance analysis of wavelet channel coding in COST207-based channel models on simulated radio-over-fiber systems at the W-band

Performance Evaluation of Wavelet-Coded OFDM on a 4.9 Gb/s W-Band Radio-Over-Fiber Link

“…These solutions usually require either an expensive computational complexity or some decrease in system spectral efficiency. Confirming the findings of [19] and [20], that WC can substantially compensate for the combined effects of deep frequency fading and error bursts disrupting orthogonality among OFDM sub-carriers, we experimentally demonstrate transmission of 4.9 Gbps 2×8 and 2×128 WC-OFDM signals over a radio-over-fiber link of 10 km fiber plus 58 m wireless distance (with distances of 100 m and beyond predicted to be achievable analog to [5]), using a radio carrier frequency of 86 GHz. We find that, for a fixed BER of 1e-4, the 2×128 WC scheme outperforms an uncoded BPSK by 1 dB while outperforming a convolutional coded QPSK by nearly 2.5 dB.…”

“…This way, it is expected that the coded signal can withstand nullifying of closely-spaced symbols. This process can be used for improving robustness against the combined effects of varying fading and noise bursts [18], [19]. The longer the matrices employed, the larger the bit-blocks that will be coded by each row, and therefore more frequent deep fading of the channel may occur without disrupting the transmission.…”

“…Recently, in [19], the Wavelet-Coding was used to enable high time-diversity gains in Doppler-rich channels with no cost to system spectral efficiency and yet with very simple decoding. Those findings were extended in [20], where it has been found that the Wavelet-Code can substantially compensate for the combined effects of deep frequency fading and error bursts that disrupt orthogonality among OFDM sub-carriers.…”

Performance Analysis of a 2 × 512 19-PSK MAP Wavelet-Coding Scheme for Multipath Varying Channels

“…Within this process, the information represented by an information bit is spread along the transmitted sequence, causing a small part of the signal to contain information about an entire block of data. This process can be used for improving robustness against the combined effects of varying fading and noise bursts [7], [8]. It can be verified that m information bits are encoded in m wavelet symbols and sent during m signaling intervals, thus allowing a spectral efficiency of 1 bit/s/Hz.…”

“…In [9] a solution has been proposed for integrating wavelet coding with power-limited systems, resulting in probabilistically shaped, non-uniform constellation diagrams. In order to avoid performance degradation due to constellation crowding, a many-to-one mapping P(•) of the wavelet symbols generated by Equation 1is performed onto an 19-PSK signal space, according to Figure 1, as proposed in [8].…”