【摘要】：在信息大爆炸的今天,大量的數(shù)據(jù)需要傳輸,頻譜已經(jīng)是稀缺資源的困境使人們將焦點放在提高頻譜利用率上。傳統(tǒng)的時分和頻分技術(shù)分別浪費了一半的時隙和頻譜,而同時同頻全雙工技術(shù)理論上將頻譜利用率提高一倍,受到了國內(nèi)外的廣泛關(guān)注。在同時同頻全雙工通信中,近端發(fā)射通道產(chǎn)生的有用信號嚴(yán)重影響接收機的正常工作,因此需要抑制近端自干擾信號來保證正常通信。目前成熟的自干擾抑制技術(shù)主要在天線部分、射頻部分和基帶部分應(yīng)用。本文設(shè)計了一種在室內(nèi)應(yīng)用、體積小、滿足兩發(fā)兩收同時同頻全雙工通信需求的射頻電路,并進行實現(xiàn)驗證。首先,介紹了常用收發(fā)機的結(jié)構(gòu)及各自的優(yōu)缺點,闡述了同時同頻全雙工通信的原理以及成熟的自干擾抑制技術(shù),對比了國內(nèi)外研究成果,分析了射頻收發(fā)機在全雙工通信應(yīng)用中面臨的挑戰(zhàn)。其次,詳細介紹了無線通信射頻電路技術(shù)指標(biāo),對關(guān)鍵技術(shù)指標(biāo)進行了理論推導(dǎo)并分析影響指標(biāo)性能的關(guān)鍵因素,根據(jù)課題應(yīng)用場景和3GPP對4G-LTE應(yīng)用指標(biāo)要求,制定了射頻收發(fā)電路的關(guān)鍵技術(shù)指標(biāo),包括EVM≤6%、ACLR≤-45dBc和通道間隔離度優(yōu)于80dB。再次,根據(jù)技術(shù)指標(biāo),設(shè)計了兩發(fā)兩收同時同頻全雙工通信射頻收發(fā)電路的實現(xiàn)方案,確定收發(fā)通道的結(jié)構(gòu),對關(guān)鍵器件選型和關(guān)鍵性能指標(biāo)鏈路預(yù)算,完成全雙工射頻電路的實現(xiàn)。最后,完成課題實物制作,對射頻電路關(guān)鍵技術(shù)指標(biāo)進行測試,詳細分析測試結(jié)果是否滿足設(shè)計要求,對不滿足設(shè)計要求的指標(biāo)給出調(diào)試方案并驗證可行性,完成兩發(fā)兩收同時同頻全雙工通信技術(shù)在射頻微基站電路中的工程驗證。論文設(shè)計并實現(xiàn)了一款小型化同時同頻全雙工射頻基站電路,包含兩個發(fā)射通道、兩個接收通道、兩個反饋通道。經(jīng)測試,電路性能指標(biāo)滿足室內(nèi)基站實際工程要求,為推動同時同頻全雙工通信技術(shù)的實際應(yīng)用做出了貢獻。
[Abstract]:In the information explosion today, a large number of data need to be transmitted, and the difficulty that spectrum is a scarce resource makes people focus on improving the efficiency of spectrum. The traditional time division and frequency division techniques waste half of the time slot and spectrum respectively, and at the same time, the same frequency full duplex technology has doubled the spectrum efficiency in theory, which has attracted wide attention both at home and abroad. In the simultaneous co-frequency full duplex communication, the useful signal generated by the near-end transmitting channel seriously affects the normal work of the receiver, so it is necessary to suppress the near-end self-interference signal to ensure the normal communication. At present, the mature self-interference suppression technology is mainly used in antenna, radio frequency and baseband. In this paper, a kind of RF circuit is designed for indoor application, which is small in size and can meet the requirements of the same-frequency full-duplex communication at the same time of two transmissions and two receivers at the same time, and the implementation is verified. Firstly, this paper introduces the structure, advantages and disadvantages of common transceiver, expounds the principle of simultaneous full duplex communication and mature self-interference suppression technology, and compares the research results at home and abroad. The challenge of RF transceiver in full duplex communication is analyzed. Secondly, the technical index of radio frequency circuit for wireless communication is introduced in detail, the key technical index is deduced theoretically and the key factors affecting the performance of the index are analyzed. According to the application scenario of the subject and the requirement of 3GPP to the application index of 4G-LTE, The key technical specifications of RF transceiver circuits are defined, including EVM 鈮，

本文編號：2465510