Differential Space-Time Modulation for Two-Phase Two-Way Relaying

• Main Authors: Yung-Hsiang Chang, 張詠翔
• Other Authors: Ruey-Yi Wei
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/s7dgjc

碩士 === 國立中央大學 === 通訊工程學系 === 106 === Wireless communications are required to transmit quantity of much data. How to transmit the same quantity of data in a shorter period of time is very important. Two-way relaying is a popular subject, where two terminal nodes transmit to each other with the help of the relay node. Two-phase two-way relaying (TPTWR) using physical-layer coding is a bandwidth efficient technique. Several TPTWR schemes using differential phase-shift keying (DPSK) which avoid the rate loss due to pilot symbols were proposed. In this thesis, we discuss multiple antenna TPTWR systems by using differential unitary space-time modulation. For constellation in terminal nodes, we propose several schemes which provide a tradeoff between error performance and data rate. Error performances of the proposed schemes are similar as single antenna TPTWR systems. In order to improve error performance, we use differential unitary space-time codes with amplitude/phase-shift keying (APSK). We propose to reduce constellation points inner and increase outer constellation points.