| Autor: |
Peter Neuhaus, Meik Dorpinghaus, Gerhard Fettweis |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
IEEE Open Journal of the Communications Society, Vol 2, Pp 1915-1934 (2021) |
| Druh dokumentu: |
article |
| ISSN: |
2644-125X |
| DOI: |
10.1109/OJCOMS.2021.3094927 |
| Popis: |
Next-generation wireless communications systems are anticipated to utilize the vast amount of available spectrum in the millimeter-wave and sub-terahertz bands above $\mathrm {100~ \text {G} \text {Hz} }$ to meet the ever-increasing demand for higher data rates. However, the analog-to-digital converter (ADC) power consumption is expected to be a major bottleneck if conventional system designs are employed at these frequencies. Instead, shifting the ADC resolution from the amplitude domain to the time domain by employing 1-bit quantization and temporal oversampling w.r.t. the Nyquist rate is expected to be more energy-efficient. Hence, we consider a system employing 1-bit quantization and temporal oversampling at the receiver, which operates on a wideband line-of-sight channel. We present a practical transceiver design for a zero-crossing modulation waveform, which combines faster-than-Nyquist signaling and runlength-limited (RLL) transmit sequences. To this aim, we derive four fixed-length finite-state machine RLL encoders enabling efficient transmit signal construction and soft-demapping at the receiver. Moreover, we propose a soft-output equalizer, which approximates maximum a posteriori RLL symbol detection. We evaluate the system performance in terms of peak-to-average-power ratio, coded block error rate, and a lower bound on the spectral efficiency (SE) w.r.t. a fractional power containment bandwidth. Our numerical results show that SEs of up to 4 bit/s/Hz are achievable with the presented transceiver design. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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