Orthogonal Space-Frequency Block Coding Waveform Design And Software Radio Platform Implementation

In recent ye ars, M I MO(M ultiple-Input M ultiple-Output) technology attracts more and more attention, and a lso occupies an important pos ition i n the next-generation mobile communicat ions. MI MO technology i s a multi-antenna technology which effec tively improves communication qual ity, makes full use of space resources and s pectr um from space, time and fr equency doma in three perspectives. It improves transfer rate, increases channel capacity e xponentially, and improves the quality of commu nication effecti vely without increa sing the spectrum resourc e cons umption or increasing the transmitting power of the antennas.OSFBC(Orthogonal Space Fre quency Block Code) tec hnology i s a very i mportant method t o impl eme nt MIMO technology. It transmits mul tiple copies of data on a different frequency and different antennas. It uses the frequency domain and spatial diversity to improve the r eli abil ity of da ta tr ansmission.Therefore, thi s paper presents an orthogonal spac e-frequency block coding waveform, and completes t he wavefor m’s present aion on soft war e radio platform which is independent researched and deve lopmented by our team. Maj or work is as follows:First of all, thi s paper de signs the orthogonal space-frequency block coding waveform. This paper des igned a practical application of or thogonal space-frequency block coding waveform. The fra me structure of t he waveform is ba sed on downli nk link- framing process of the LTE physical layer mode of FDD fra me structure. Thesis designs the bandwidth as 2.7 M Hz, the rate of data sources as 980 kbps, s ets fr ame rate to 2.24 MHz, modulati on modes uses CRC c hecksum, one-third bi t-rate Convolutional coding, int erleaved and QPSK modul ation. And then t his pape r divi des the orthogonal s pace-frequency block coding wave form software into four parts, including the framing of the waveform, upper or lower frequency, synchronous and decoding codes.For each part, a detailed des cript ion is give n.Second, this paper complet es the graphical development of orthogonal s pace-frequency block codi ng wavefor m. This paper uses System Gene rator to develop the waveform. This paper a chieves the hardware emulation of ort hogonal s pace-frequency block coding waveforms, i ncluding CRC check-sum, convolutional coding and interleaving, QPSK modulat ion, OSFBC coding, modulation,s ynchroniz ation and frequenc y offset estimati on for OFDM, O SFBC decoding and cha nnel est imation, etc. This paper complete s timing verifi cation of trans mit ter, recei ver s ynchroniz ation, the receiving end of the timing validation re sults and CRC checksum validation, bit you c an download latest build on file for debugging.Third, this paper shows the results of orthogonal space-frequency bloc k coding waveform. This paper demons trates on self-developed software radio pl atform of my team. This paper gives the implementation of trans mitter, receiver, workflow a nd present ation platform of the waveform on s oftware de fined r adio pl atform. This paper s hows the functional and performance testi ng and anal ysis of the waveform,expe riment al result s show that in wall interference disturbances, personnel, mac hines(such as computers, spectrum analyzers and other equipment) inter ference in indoorenvironment pe rformance testing r esults obtained with Matlab simulation results error less than 2 dB.In c onclusion, the pape r cmmpletes the orthogonal spac e-frequency block coding waveform design, implementation, and verification. The sis, the pr ogr ammes is ac hieveable, and c an be directly applied to next generation mobile communication s ystems, wi rele ss LANs, Internet of things, scenes, and improve the syst em of t ransmit diversity pe rfor mance. Also this project provides a re ference for graphical visualiz ation of communi cation systems.