中圖分類號(hào)： TN911.7 文獻(xiàn)標(biāo)識(shí)碼： A DOI：10.16157/j.issn.0258-7998.212382 中文引用格式： 牛安東，苗碩，劉佳寧，等. GFDM中基于高階長(zhǎng)短時(shí)記憶神經(jīng)網(wǎng)絡(luò)的自適應(yīng)均衡器[J].電子技術(shù)應(yīng)用，2022，48(8)：95-100. 英文引用格式： Niu Andong，Miao Shuo，Liu Jianing，et al. An adaptive equalizer based on high order LSTM in GFDM[J]. Application of Electronic Technique，2022，48(8)：95-100.
An adaptive equalizer based on high order LSTM in GFDM
1.College of Electronic Information and Optical Engineering，Nankai University，Tianjin 300350，China； 2.Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology，Nankai University，Tianjin 300350，China
Abstract： In the generalized frequency division multiplexing system(GFDM), in order to solve the problem of severe signal distortion in the sub-6 GHz frequency band channel of the vehicle-mounted mobile communication under the 5G network, an adaptive equalizer based on high order long short-term memory(HO-LSTM) neural network structure is proposed. Based on the traditional high-order feedforward neural network(HO-FNN), HO-LSTM adaptive equalizer uses the generalized memory polynomial model(GMP) with lower complexity instead of Volterra model, and introduces LSTM neural network to make it more suitable for the prediction of complex nonlinear models. The results show that, compared with the traditional HO-FNN equalizer and LSTM equalizer, the equalization effect of the proposed HO-LSTM equalizer is significantly improved, and the system performance is further improved.
Key words : generalized frequency division multiplexing(GFDM)；long short-term memory(LSTM)；high order neural network；generalized memory polynomial(GMP)
0 引言
近年來(lái)，第五代移動(dòng)通信技術(shù)(5th Generation Mobile Communication Technology，5G)受到了極大的關(guān)注。廣義頻分復(fù)用技術(shù)(Generalized Frequency Division Multiplexing，GFDM)作為5G候選波形，由于其能夠有效地克服碼間干擾，讓依賴于超可靠低時(shí)延通信的車聯(lián)網(wǎng)等業(yè)務(wù)從中受益[1]。在中國(guó)工信部出臺(tái)的針對(duì)5G通信規(guī)劃中，將Sub-6 GHz頻段作為商用頻段。相比于第四代移動(dòng)通信(4th Generation Mobile Communication Technology，4G)中1.8 GHz～2.7 GHz的低頻段信道，Sub-6 GHz的高頻段信道導(dǎo)致的信號(hào)失真會(huì)更加嚴(yán)重[2]。
