Fifth generation(5G)wireless networks must meet the needs of emerging technologies like the Internet of Things(IoT),Vehicle-to-everything(V2X),Video on Demand(VoD)services,Device to Device communication(D2D)and many o...Fifth generation(5G)wireless networks must meet the needs of emerging technologies like the Internet of Things(IoT),Vehicle-to-everything(V2X),Video on Demand(VoD)services,Device to Device communication(D2D)and many other bandwidth-hungry multimedia applications that connect a huge number of devices.5G wireless networks demand better bandwidth efficiency,high data rates,low latency,and reduced spectral leakage.To meet these requirements,a suitable 5G waveform must be designed.In this work,a waveform namely Shaped Offset Quadrature Phase Shift Keying based Orthogonal Frequency Division Multiplexing(SOQPSK-OFDM)is proposed for 5G to provide bandwidth efficiency,reduced spectral leakage,and Bit Error Rate(BER).The proposed work is evaluated using a real-time Software Defined Radio(SDR)testbed-Wireless open Access Research Platform(WARP).Experimental and simulation results show that the proposed 5G waveform exhibits better BER performance and reduced Out of Band(OOB)radia-tion when compared with other waveforms like Offset Quadrature Phase Shift Key-ing(OQPSK)and Quadrature Phase Shift Keying(QPSK)based OFDM and a 5G waveform candidate Generalized Frequency Division Multiplexing(GFDM).BER analysis shows that the proposed SOQPSK-OFDM waveform attains a Signal to Noise Ratio(SNR)gain of 7.2 dB at a BER of 10�3,when compared with GFDM in a real-time indoor environment.An SNR gain of 8 and 6 dB is achieved by the proposed work for a BER of 10�4 when compared with QPSK-OFDM and OQPSK-OFDM signals,respectively.A significant reduction in OOB of nearly 15 dB is achieved by the proposed work SOQPSK-OFDM when compared to 16 Quadrature Amplitude Modulation(QAM)mapped OFDM.展开更多
基于多个非线性功率放大器的M A-SOQPSK(m u lti-am p litude-shaped offset quadrature phase-sh iftkey ing)调制具有很高的功率效率和频谱效率,但是其最大似然接收机非常复杂。该文利用两路SOQPSK波形的时域相关性,提出了一种简单的...基于多个非线性功率放大器的M A-SOQPSK(m u lti-am p litude-shaped offset quadrature phase-sh iftkey ing)调制具有很高的功率效率和频谱效率,但是其最大似然接收机非常复杂。该文利用两路SOQPSK波形的时域相关性,提出了一种简单的最大似然接收机,在不降低接收性能的前提下,将相关器从128个减少到8个。仿真结果表明该最大似然接收机的误比特率性能仅比16 QAM(quadrature am p litude m odu lation)的恶化0.6 dB。进一步简化的接收机用平均波形代替相似的SOQPSK波形,将相关器进一步减少到4个,并用2个简单的4状态维特比译码器代替一个复杂的16状态维特比译码器,仿真表明该简化接收机的误比特率性能比最大似然接收机的恶化1.2 dB。仿真和分析表明,M A-SOQPSK的功率效率要高于QAM。展开更多
文摘Fifth generation(5G)wireless networks must meet the needs of emerging technologies like the Internet of Things(IoT),Vehicle-to-everything(V2X),Video on Demand(VoD)services,Device to Device communication(D2D)and many other bandwidth-hungry multimedia applications that connect a huge number of devices.5G wireless networks demand better bandwidth efficiency,high data rates,low latency,and reduced spectral leakage.To meet these requirements,a suitable 5G waveform must be designed.In this work,a waveform namely Shaped Offset Quadrature Phase Shift Keying based Orthogonal Frequency Division Multiplexing(SOQPSK-OFDM)is proposed for 5G to provide bandwidth efficiency,reduced spectral leakage,and Bit Error Rate(BER).The proposed work is evaluated using a real-time Software Defined Radio(SDR)testbed-Wireless open Access Research Platform(WARP).Experimental and simulation results show that the proposed 5G waveform exhibits better BER performance and reduced Out of Band(OOB)radia-tion when compared with other waveforms like Offset Quadrature Phase Shift Key-ing(OQPSK)and Quadrature Phase Shift Keying(QPSK)based OFDM and a 5G waveform candidate Generalized Frequency Division Multiplexing(GFDM).BER analysis shows that the proposed SOQPSK-OFDM waveform attains a Signal to Noise Ratio(SNR)gain of 7.2 dB at a BER of 10�3,when compared with GFDM in a real-time indoor environment.An SNR gain of 8 and 6 dB is achieved by the proposed work for a BER of 10�4 when compared with QPSK-OFDM and OQPSK-OFDM signals,respectively.A significant reduction in OOB of nearly 15 dB is achieved by the proposed work SOQPSK-OFDM when compared to 16 Quadrature Amplitude Modulation(QAM)mapped OFDM.
文摘基于多个非线性功率放大器的M A-SOQPSK(m u lti-am p litude-shaped offset quadrature phase-sh iftkey ing)调制具有很高的功率效率和频谱效率,但是其最大似然接收机非常复杂。该文利用两路SOQPSK波形的时域相关性,提出了一种简单的最大似然接收机,在不降低接收性能的前提下,将相关器从128个减少到8个。仿真结果表明该最大似然接收机的误比特率性能仅比16 QAM(quadrature am p litude m odu lation)的恶化0.6 dB。进一步简化的接收机用平均波形代替相似的SOQPSK波形,将相关器进一步减少到4个,并用2个简单的4状态维特比译码器代替一个复杂的16状态维特比译码器,仿真表明该简化接收机的误比特率性能比最大似然接收机的恶化1.2 dB。仿真和分析表明,M A-SOQPSK的功率效率要高于QAM。
