On the Spectral Efficiency of Oversampled 1-Bit Quantized Systems for Wideband LOS Channels

In this work, we investigate the spectral efficiency (SE) of a system where the transmitter utilizes zero crossing modulation (ZXM), which was implemented by combining faster-than-Nyquist signaling with runlength-limited transmit sequences, and the receiver employs 1-bit quantization and temporal oversampling. The SE is evaluated numerically with respect to a fractional power containment bandwidth, which allows for a fractional amount of out-of-band emissions. In contrast to most existing works, the SE is evaluated for a practical transmitter and receiver implementation under a wideband line-of-sight channel model. The studied system achieves SEs above 3 bit/s/Hz, which corresponds to an increase of more than 50 % as compared to standard QPSK. Furthermore, the studied system outperforms a related system by Deng et al., which also employs 1-bit quantization and temporal oversampling, by approx. 15 dB at a SE of 3 bit/s/Hz.

[1]  Edgar N. Gilbert.  Increased information rate by oversampling , 1993, IEEE Trans. Inf. Theory.

[2]  Meik Dörpinghaus,et al.  1-Bit Quantization and Oversampling at the Receiver: Communication Over Bandlimited Channels With Noise , 2017, IEEE Communications Letters.

[3]  Gerald Matz,et al.  Performance Assessment of MIMO-BICM Demodulators Based on Mutual Information , 2012, IEEE Transactions on Signal Processing.

[4]  Wenyi Zhang,et al.  Bandlimited Communication With One-Bit Quantization and Oversampling: Transceiver Design and Performance Evaluation , 2019, ArXiv.

[5]  Gerhard Fettweis,et al.  On the achievable rate of bandlimited continuous-time 1-bit quantized AWGN channels , 2017, 2017 IEEE International Symposium on Information Theory (ISIT).

[6]  John Cocke,et al.  Optimal decoding of linear codes for minimizing symbol error rate (Corresp.) , 1974, IEEE Trans. Inf. Theory.

[7]  Calvin C. Elgot,et al.  Review: George H. Mealy, A Method for Synthesizing Sequential Circuits , 1957 .

[8]  Emil Björnson,et al.  Spatio-Temporal Waveform Design for Multiuser Massive MIMO Downlink With 1-bit Receivers , 2016, IEEE Journal of Selected Topics in Signal Processing.

[9]  Fredrik Rusek,et al.  Faster-Than-Nyquist Signaling , 2013, Proceedings of the IEEE.

[10]  George H. Mealy,et al.  A method for synthesizing sequential circuits , 1955 .

[11]  Shlomo Shamai.  Information rates by oversampling the sign of a bandlimited process , 1994, IEEE Trans. Inf. Theory.

[12]  Edward F. Moore,et al.  Gedanken-Experiments on Sequential Machines , 1956 .

[13]  Meik Dörpinghaus,et al.  Zero Crossing Modulation for Communication with Temporally Oversampled 1-Bit Quantization , 2019, 2019 53rd Asilomar Conference on Signals, Systems, and Computers.

[14]  R. B. Staszewski.  Digitally intensive wireless transceivers , 2012, IEEE Design & Test of Computers.

[15]  Meik Dörpinghaus,et al.  Sub-THz Wideband System Employing 1-bit Quantization and Temporal Oversampling , 2020, ICC 2020 - 2020 IEEE International Conference on Communications (ICC).

[16]  Gerhard Fettweis,et al.  1-bit quantization and oversampling at the receiver: Sequence-based communication , 2018, EURASIP J. Wirel. Commun. Netw..

[17]  Schouhamer Immink,et al.  Codes for mass data storage systems , 2004 .

[18]  J.E. Mazo,et al.  Digital communications , 1985, Proceedings of the IEEE.