Iterative canceller of adjacent channel interference induced by nonlinearity of power amplifier in millimeter wave systems

Adjacent Channel Interference Cancellation in FDM Transmissions

“…In addition, the proposed method includes the estimation of the interfering PA modeled by a memory polynomial model [29]. In contrast to the state-of-the-art [26], the proposed canceller does not use band separation in the analog domain negatively affected by the imprecise band-pass filters, but rather a tailored frequency-domain digital filter. In the following, a matrix form of modulation [15], [30]:…”

“…As a reference state-of-the-art method to compare the performance with, we have selected the ACI approach from [26] originally proposed for single-carrier systems, and we tailored it to the multicarrier GFDM case. In order to make the methods comparable, we did not use any Forward Error Correction (FEC) for both methods and we used the same approach described in Section V for channel-estimator chain modeling.…”

“…In order to make the methods comparable, we did not use any Forward Error Correction (FEC) for both methods and we used the same approach described in Section V for channel-estimator chain modeling. In all cases we considered a perfect synchronization of U1 and U2 signal reception, as in [26]. The most important difference between the proposed and the reference method is that one expects two separate RF front-ends with analog band-selection filters.…”

“…The authors of [25] considered a dual satellite communication system with a Volterra filter-based cancellation of first and third order interference terms for narrowband single-carrier signals. Similarly to our approach, the generation of the interference signal replica is considered in the ACI cancellation method proposed in [26] for single-carrier signals. The memoryless characteristic of the interfering transmitter PA was estimated from the received data signals, as the pilot signals usually have much lower PAPR.…”

Cancelamento de Distorções Não Lineares em Sistemas OFDM Cooperativos AF

“…Em [14], foi aplicado um método iterativo para o cancelamento de distorção não linear no receptor para um sistema de Rádio Cognitivo baseado em FBMC (Filter Bank based Multi-Carrier) sobre um canal com desvanecimento plano usando o método de detecção de energia. Em [15], os autores propõem um esquema de cancelamento iterativo para interferência de canal adjacente (ACI -Adjacent Channel Interference) causada por PA não linear em um sistemas de ondas milimétricas (mmW -millimeter wave) por meio de análise de regressão polinomial dos símbolos pilotos e do sinal modulado recuperado no receptor para aumentar a precisão da estimativa nas regiões de nível de sinal mais elevado.…”