Low-peak-to-average Ratio STF Sequence Design For Channel Bonding Scenes In 60GHz Milimeter-wave Systems

With the rapid developme nt of mobile Internet and I nternet of Things techno logies,wire less data traffic is increasing day by day.High-qualit y,high-speed data trans mission requirements require not only more advanced wire less transmission techno logies,but also more spectrum resources.The low-band resources of the radio spectrum have become saturated,so the expansion of spectrum resources into the millimeter-wave band by mobile communication syste ms has become a trend.The 60 GHz millimeter wave has its unique advantages: r ich spectrum resources,high trans mission rate,strong directionalit y,and strong anti-interference perfor mance.Therefore,the research of 60 GHz millimeter wave communication syste m has received extensive attention.Based on the exist ing communication standards,this paper will study the design of low-peak-to-average ratio STF sequence for the next generation 60 GHz millimeter-wave OFDMA system.Firstly,the channe l bonding techno logy of t he next generation 60 GHz millimeter wave OFDMA system is briefly introduced,and a comprehensive requ ireme nt analys is of STF sequence design in channel bonding scenario is done.Then the design method of STF sequence is given according to requirements and four low-peak-to-average frequency-domain STF sequence design sche mes based on Golay pair/ mate are proposed.The resource block size of scheme one is 80,and the other three schemes is 84.Each scheme gives detailed sequence design steps and calc ulates the PAPR values for each part of each sequence.It can be seen from the PAPR result of the sequence that when the number of channe l bind lings is 1(ie,a single 2.16 GHz channel),the PAPR of the entire sequence is very sma ll,and the PAPR of one resource block,two resource blocks,and three resource blocks is also suffic ient ly small;when the channel binding number is 2,3,4,each sequence not only satis fies the low peak-to-average ratio characteristics of the ent ire sequence after channel bonding,but also each of the 2.16 GHz channe ls also satisfies the low peak-to-average ratio characterist ic.The STF sequence design proposed in t his paper has the characterist ics of high spectrum ut ilization,low system imple mentat ion comp lexity,and low peak-to-average ratio,which can fully meet the data transmissio n requirements in various channel bonding scenarios.Fina lly,in order to further reduce the PAPR of the sequence,two sequence optimization a lgorit hm based on evolut ionary algorithm are proposed:s ingle-objective sequence optimizat ion algorit hm and mult i-objective sequence optimizat ion algorit hm.The simulat ion results show that the single-objective sequence optimizat ion algorit hm can cont inuously optimize the sequence,so that the PAPR of the whole sequence is closer to an ideal va lue.The multi-objective sequence optimizat ion algorit hm is suitable for mult i-target sequences.The algorit hm can not only ensure the PAPR of the whole sequence is significant ly reduced,but also ameliorate the PAPR of the internal subsequence.Therefore,both optimizat ion algorithms can effect ive ly reduce the PAPR of the sequence.After the optimization of the sequence design scheme 4,the PAPR performance has been significantly improved.The sequence design proposed in this paper has certain reference value for the research of the next generation 60 GHz millimeter wave communicat ion system,moreover the sequence design met hod and the sequence optimization a lgorithm based on evolut ionary algorit hm provide some theoretical research value for low peak-to-average ratio sequence design.