多入單出正交空時分組碼系統(tǒng)的調(diào)制識別
doi: 10.11999/JEIT140644 cstr: 32379.14.JEIT140644
基金項目:
通信信息控制和安全重點實驗室基金(9140C130304120C13064)和國家自然科學基金(61201282)資助課題
Modulation Identification for Orthogonal Space-time Block Code in Multiple Input Single Output Systems
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摘要: 在現(xiàn)代無線通信系統(tǒng)中，采用正交空時分組碼(STBC)的多天線發(fā)射技術是提高通信速率和可靠性，并且能夠實現(xiàn)簡單譯碼的關鍵技術。該文針對瑞利信道系統(tǒng)模型，提出一種適用于多入單出正交空時分組碼(OSTBC)的調(diào)制識別算法。該算法通過對接收到的數(shù)據(jù)進行重排，將多入單出的系統(tǒng)模型轉化為類似多入多出的系統(tǒng)模型，并且根據(jù)信源的特殊性用最大似然的思想實現(xiàn)調(diào)制類型的識別。仿真結果驗證了所提算法的有效性。
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關鍵詞:
- 無線通信 /
- 調(diào)制識別 /
- 多入單出 /
- 正交空時分組碼
Abstract: In modern wireless communication systems, multiple-antenna-transmitting in association with Orthogonal Space-Time Block Code (OSTBC) is a key technology to improve communication rate, reliability, and decoding complexity. In this paper, a modulation identification algorithm is proposed which is well suitable for the Multiple Input Single Output (MISO)-OSTBC system. First, the MISO system is transformed into a Multiple Input Multiple Output (MIMO) system by reshaping the received data. Then, maximum likelihood based approach is used to identify the modulation. Simulations validate the effectiveness of the proposed algorithm. -
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