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Frequency Hopping (FH) systems are increasingly popular in contemporary wireless communications, especially in military communications and electronic confrontations. The key performance of FH systems includes robustness, continuation, and resilience. To measure these factors, additional interference is introduced into FH systems, and a large number of algorithms and schemes have been proposed to maximize...
In this letter, we propose a novel symbol-asynchronous non-orthogonal multiple access (ANOMA) scheme for downlink transmissions. First, ANOMA introduces an artificial symbol-offset between packets destined for different user equipment (UE) in order to reduce their mutual interference. Second, ANOMA adopts a pre-coding at the base station and a whitening-and-decomposing (WD) detection scheme at the...
An in-line Mach–Zehnder interferometer (MZI) is proposed and experimentally demonstrated. The sensor is fabricated by splicing a segment of seven-core fiber (SCF) and two segments of very short multi-mode fibers (MMFs). The mode field of the MMF used in our experiments close to the region of hexagonally distributed fiber cores of the SCF, which help to obtain a higher coupling efficiency. A clear...
In this paper, the downlink non-orthogonal multiple access (NOMA) system with symbol-misalignment is studied where Successive Interference Cancellation (SIC) process is applied at the reciever sides. In doing so, we first induce the channel model of asynchronous NOMA and BER function. After that, the capacity region of synchronous and asynchronous NOMA are obtained respectively. At last, the simulation...
In this paper, the performance of interference sensing of full duplex cognitive anti-jamming (FCAJ) receiver impaired by phase noise in local oscillators is investigated under fading channel. Firstly, energy detection based the interference signal to noise ratio (INR) of FCAJ receiver with phase noise under different channels is analyzed. Then, the detection and false alarm probabilities in closed-form...
In this paper, we have proposed link balancing scheme based on MIMO switching for the high speed wireless access system via dual-hop MIMO relays, and analyzed the capacity of different MIMO transmission mode. From these studies, we can conclude that the relayed MIMO system can support high speed group mobility and the link balancing method is able to enhance the transmission performance.
The vector dirty paper coding (DPC) can achieve rate region for multicell cooperation system. Conventional DPC implementation approach suffer the capacity loss due to quantization which lead to modulo loss. In this paper, we proposed a vector DPC transmission scheme with non-binary LDPC codes and low density generator matrix based quantizer for multicell processing. And the random coding based proof...
This paper addresses the problem cooperative downlink transmission in multicell multiantenna cellular networks. We have presented scheme for base station coordination and cooperation in MIMO with zero forcing beamformig system. Firstly, a projected channel matrices is given and it make the beams steer into the preferred user direction. Secondly, partial collaboration transmission and distributed scheduling...
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