正交頻分復(fù)用傳輸速率最大化自適應(yīng)水聲通信算法研究

羅亞松; 許江湖; 胡洪寧; 賀靜波; 陳占偉

doi:10.11999/JEIT150440

正交頻分復(fù)用傳輸速率最大化自適應(yīng)水聲通信算法研究

doi: 10.11999/JEIT150440 cstr: 32379.14.JEIT150440

1.
(海軍工程大學(xué)電子工程學(xué)院武漢 430033) ②(海軍青島水警區(qū)后勤部艦艇教練室青島 266102)

基金項(xiàng)目:

國家自然科學(xué)基金(61101205)

計(jì)量
- 文章訪問數(shù): 1475
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- 被引次數(shù): 0
出版歷程
- 收稿日期: 2015-04-15
- 修回日期: 2015-08-03
- 刊出日期: 2015-12-19

Research on Self-adjusting OFDM Underwater Acoustic Communication Algorithm for Transmission Rate Maximization

1.
(Electronics Engineering College, Naval Universit of Engineering, Wuhan 430033, China)
2.
(Coach Division of Logistic Department, Navy Qingdao Marine Area, Qingdao 266102, China)

Funds:

The National Natural Science Foundation of China (61101205)

摘要

摘要: 該文在對正交頻分復(fù)用(OFDM)水聲通信速率最大化問題建?；A(chǔ)上，對注水算法的運(yùn)算量進(jìn)行了合理簡化，實(shí)現(xiàn)了對子載波初始能量的快速分配。針對固定判決門限離散比特分配算法存在的碼元能量嚴(yán)重浪費(fèi)和速率損失問題，提出了基于貪婪的比特分配方案，以較小的計(jì)算量代價(jià)實(shí)現(xiàn)了OFDM通信速率的顯著提高。研究表明，在壓縮信道編碼的不完全信道估計(jì)下，新算法仍具有良好的通信速率及誤碼率性能，適用于時(shí)變水聲信道。
- 水聲通信 /
- 正交頻分復(fù)用(OFDM) /
- 自適應(yīng) /
- 注水算法
Abstract: Based on the modeling of transmission rate maximization problem for Orthogonal Frequency Division Multiplexing (OFDM) underwater acoustic communication, the computing amount for water-filling algorithm is reduced reasonably, which realizes rapid assignments for sub-carriers initial energy. To deal with the serious waste of symbol energy existing in the bit assigning algorithm based on fixed threshold, the new greedy algorithm is brought forward, which improves the OFDM transmission rate remarkably with less cost of additional calculation. Results show that the new algorithm behaves favorable properties of transmission rate and Bit Error Rate (BER) even with incomplete channel estimation information suitable for time-variant underwater acoustic channel.
- Underwater acoustic communication /
- Orthogonal Frequency Division Multiplexing (OFDM) /
- Self- adjusting /
- Water-filling algorithm

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參考文獻(xiàn)(21)

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