本文選題：協(xié)同多點(diǎn)傳輸 + 有限反饋　； 參考：《哈爾濱工程大學(xué)》2014年碩士論文

【摘要】：協(xié)同多點(diǎn)傳輸(Coordinated multi-point,CoMP)技術(shù)因?yàn)槠渥吭降目剐^(qū)間干擾能力被公認(rèn)為L(zhǎng)TE-A通信的關(guān)鍵技術(shù)之一。在實(shí)際CoMP系統(tǒng)中,各個(gè)協(xié)作基站必須通過(guò)本小區(qū)用戶反饋回來(lái)的瞬時(shí)信道信息來(lái)獲知本地信道狀態(tài)信息(Channel State Information, CSI),所以由于有限反饋而產(chǎn)生的誤差會(huì)嚴(yán)重影響系統(tǒng)性能,必須加以考慮。本文基于CoMP聯(lián)合傳輸(Joint Processing, JP)系統(tǒng)的下行鏈路傳輸模型,考慮有限反饋和信道時(shí)延,研究了有限反饋比特分配方案及用戶調(diào)度算法。為了減小非完全CSI給系統(tǒng)帶來(lái)的性能影響,論文提出了基于差分進(jìn)化算法的有限反饋比特分配算法。該算法通過(guò)使用差分進(jìn)化算法對(duì)分配反饋比特進(jìn)行優(yōu)化,從而最大限度的降低因?yàn)橛邢薹答伓o系統(tǒng)所帶來(lái)的速率損失。仿真結(jié)果表明,在總反饋比特?cái)?shù)相同時(shí),本文所提出的算法不僅能夠與窮舉法比特分配算法同樣地實(shí)現(xiàn)系統(tǒng)總傳輸速率的最大化,而且比窮舉法比特分配算法計(jì)算復(fù)雜度更小,更利于實(shí)現(xiàn)。在實(shí)際系統(tǒng)中,CSI都是非完全可知的,所以在實(shí)際系統(tǒng)的設(shè)計(jì)時(shí)一定要要考慮有限反饋和信道時(shí)延給系統(tǒng)性能帶來(lái)的影響。針對(duì)這一問(wèn)題,本文研究了有限反饋和信道時(shí)延條件下的CoMP-JP反饋比特分配問(wèn)題,計(jì)算得出了由非完全CSI而引起的系統(tǒng)速率損失,并得出終端所需要反饋給本服務(wù)基站和相鄰基站的最佳反饋比特?cái)?shù)值。在此基礎(chǔ)上,本文研究了 CoMP聯(lián)合傳輸系統(tǒng)下行鏈路中的用戶調(diào)度算法,對(duì)比分析了基于系統(tǒng)容量最大化準(zhǔn)則、基于用戶信道相關(guān)因子最小化準(zhǔn)則和基于用戶公平性準(zhǔn)則的三種用戶調(diào)度算法。算法仿真結(jié)果表明在本文所討論的三種改進(jìn)算法中,基于系統(tǒng)容量最大化準(zhǔn)則的用戶調(diào)度算法性能更優(yōu),基于用戶信道相關(guān)因子最小化準(zhǔn)則的用戶調(diào)度算法的各用戶之間信道相關(guān)性最好。
[Abstract]:Coordinated multi-point transfer (coop) technology is recognized as one of the key technologies for LTE-A communication because of its excellent anti-inter-cell interference capability. In the actual comp system, each cooperative base station must obtain the local channel state information (CSI) through the instantaneous channel information returned by the local user, so the error caused by the limited feedback will seriously affect the performance of the system. It must be considered. Based on the downlink transmission model of comp (Joint processing, JP) system, a limited feedback bit allocation scheme and a user scheduling algorithm are studied in this paper, taking into account the limited feedback and channel delay. In order to reduce the effect of incomplete CSI on the performance of the system, a finite feedback bit allocation algorithm based on differential evolution algorithm is proposed in this paper. The algorithm optimizes the allocation of feedback bits by using differential evolution algorithm to minimize the rate loss caused by finite feedback. Simulation results show that when the total feedback bit number is the same, the proposed algorithm can not only maximize the total transmission rate of the system as the exhaustive bit allocation algorithm, but also have less computational complexity than the exhaustive bit allocation algorithm. It is more conducive to realization. CSI is not completely knowable in practical systems, so the effect of limited feedback and channel delay on system performance must be considered in the design of practical systems. In order to solve this problem, the CoMP-JP feedback bit allocation problem under the condition of limited feedback and channel delay is studied, and the system rate loss caused by incomplete CSI is calculated. The optimal feedback bit value of the terminal to the serving base station and the adjacent base station is obtained. On this basis, the user scheduling algorithm in the downlink of comp joint transmission system is studied, and the system capacity maximization criterion is compared and analyzed. Three user scheduling algorithms based on user channel correlation factor minimization criterion and user fairness criterion. The simulation results show that among the three improved algorithms discussed in this paper, the performance of the user scheduling algorithm based on the system capacity maximization criterion is better. The user scheduling algorithm based on the minimization criterion of user channel correlation factor has the best channel correlation among users.
【學(xué)位授予單位】：哈爾濱工程大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN929.5

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