Abstract
The performance of co-time co-frequency full duplex (CCDF) communication systems is limited by the self-interference (SI), which is the result of using the same frequency for transmission and reception. However, current communication systems use separate frequencies for transmission and reception, respectively. Therefore, SI is an important issue to be fixed for future-generation systems. As the radio frequency (RF) spectrum is very scared and a CCDF system has the potential to reduce the current spectrum use by half. In this paper, a CCDF communication system is modeled and a combination of RF and digital cancellations is used to mitigate the SI. The simulation results reveal that the proposed combination of RF and digital cancellation achieve the bit-error-rate of 10-11 at an interference-to-signal ratio of 10 dB, which is satisfying value for CCDF communication. The achieved efficiency of the proposed system is 13 bits/sec/Hz at a signal-to-noise ratio of 50 dB. The antenna separation of 35 dB is considered for the proposed model to keep the data loss as minimum as possible. The performance can be improved further by increasing digital-to-analog converter bits but with added complexity.
Highlights
Wireless frequency spectrum turns out to be crowded and costly because of the development of bandwidthdemanding applications used in telecommunication
Two antennas are required for full duplex communication; one side works as a transceiver and vice versa but the main challenge is generated through transmit antenna at the receiving antenna is addressed in such systems is a selfinterference
The power amplifier introduces nonlinear distortion in the radio frequency (RF) cancellation of the transmitter chain. It is shown in the above figure that the number of digital to analog conversion (DAC) bits increased to enhance the performance while analog to digital conversion (ADC) bits are taken as fixed
Summary
Wireless frequency spectrum turns out to be crowded and costly because of the development of bandwidthdemanding applications used in telecommunication. Two antennas are required for full duplex communication; one side works as a transceiver and vice versa but the main challenge is generated through transmit antenna at the receiving antenna is addressed in such systems is a selfinterference. The SIC is a core problem of CCFD so that it carries great weight and a means to do research on SIC for next-generation wireless networks and propose amendments in current cellular communication. It is always done through half-duplex; the transmission and reception have been done on distinct slots when simultaneous communication is done through FD.
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