| 摘要: |
| 为了抑制异构多层通信网络的多层干扰并保证多级服务质量(Quality of Service,QoS）需求，提出了一种新型跳频多址接入（Frequency Hpping Multiple Access,FHMA）技术。首先基于传统伪随机FH序列和数学变换给出了一类具有两级汉明相关的FH图案（FH 序列集）设计方法,然后在两层小区上行链路中对采用这类FH序列的OFDM/FHMA系统的抗干扰性能和频谱效率进行了研究。信号分析和仿真结果表明，所提出的 FHMA 方案可以缓解两层小区的用户干扰，降低系统传输误码率（Bit Error Rate,BER），同时保证两层用户的差异化传输质量（两级BER性能和频谱效率）。该FHMA技术能够满足两层干扰抑制和多级服务质量的设计目标，这是传统伪随机FH技术难以实现的。 |
| 关键词: 两层小区网络 干扰抑制 跳频多址接入（FHMA） 跳频序列 多级服务质量 |
| DOI：10.20079/j.issn.1001-893x.220321005 |
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| 基金项目: |
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| Two-level frequency hopping multiple access(FHMA) technique for two-tier cellular networks |
| WANG Wentao,YANG Kui |
| (Southwest China Institute of Electronic Technology,Chengdu 610036,China) |
| Abstract: |
| To mitigate the multi-tier interference and guarantee the multi-level quality of service(QoS) in heterogeneous multi-tier networks,a new frequency hopping multiple access(FHMA) technique is proposed.Firstly,a construction algorithm of the two-level Hamming correlations FH pattern(FH sequence set) is proposed based on the traditional pseudo-random FH sequence and mathematical transformations.Then,in the uplinks of two-tier cells,the performance of interference mitigation and spectral efficiency of OFDM/FHMA system which adopts the proposed FH sequence is investigated.The signal analysis and simulation results show that the proposed FHMA technique can relieve the impact of two-tier cell user interference so as to decrease the bit error rate(BER) and also guarantee the differential transmission QoS for two-tier users(two-level BER and two-level spectral efficiency).The proposed FHMA technique can satisfy the design targets of two-level interference mitigation and multi-level QoS,while the traditional pseudo-random FH technique cannot. |
| Key words: two-tier cellular network interference mitigration frequency hopping multiple access(FHMA) FH sequence multi-level QoS |
