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- Carrier frequency offset is one of the key problems in OFDM system. 摘要載波頻率偏移是OFDM系統實(shí)現的關(guān)鍵問(wèn)題之一。
- The results indicate that frequency offset can be obtained robustly. 海量實(shí)驗數據證明,對應的數據是魯棒的。
- The simulation for QPSK shows that the algorithm can estimate the carrier phase and frequency offset accurately and reduce the system BER effectively. 結果表明，用該算法可以精確估計載波相位和頻差，有效地降低系統的誤碼率。
- The ways of estimating the frequency offset and Doppler spread width in WCDMA system are studied in this paper. 本文主要研究了WCDMA(寬帶碼分多址)系統中頻偏和最大多普勒頻偏的估計方法。
- It has previously been shown that PCC substantially reduces the sensitivity of OFDM to carrier frequency offset. PCC能夠顯著(zhù)地降低OFDM對載波頻偏的敏感性。
- A novel scheme of estimating the carrier frequency offset in CDMA system with the continuous pilot channel is proposed. 摘要本文針對存在載頻頻偏的CDMA系統，提出了一種新的估計該固有頻偏的方法。
- A new frequency offset and channel estimation joint algorithm for OFDM system is proposed. 摘要針對正交頻分復用系統提出一種新的頻偏與信道聯(lián)合估計的算法。
- Based on the fixed sampling interval technique, an improved phasor computing algorithm is proposed to correct the errors caused by DFT in the presence of frequency offset. 推導出一種在定間隔采樣基礎上能夠有效消除非額定頻率下離散傅里葉變換(DFT)算法產(chǎn)生的頻率泄漏影響的相量校正算法。
- Then the phase trajectory is estimated based on MMSE criterion, and the frequency offset and initial phase can be achieved. 在此基礎上，基于MMSE準則計算載波相位的軌跡，得到頻差和初始相位。
- OFDMA inherits from OFDM the weakness of being sensitive to synchronization errors, especially to carrier frequency offset(CFO). OFDMA系統繼承了OFDM對同步誤差敏感的缺點(diǎn)，尤其是對載波頻率偏移(CFO)。
- In this thesis, a joint symbol timing and carrier frequency offset estimator is proposed for orthogonal frequency division multiplexing (OFDM) systems. 中文摘要本論文里，我們提出了一個(gè)應用在正交分頻多工系統中的符元時(shí)間與載波頻率誤差估測器。
- By mitigation with the aid of time-frequency interleaving, we develop effective frequency offset estimation under interference in this thesis. 這篇論文，主要是在利用時(shí)頻交錯的協(xié)助，發(fā)展出在干擾環(huán)境下有效的頻率偏估測方法。
- If the frequency offset is large enough, the traditional PLL cannot be locked.Such situation would lead to the system corruption. 當頻差較大時(shí)，接收端用于載波恢復的鎖相環(huán)路無(wú)法鎖定，導致系統不能正常工作。
- This paper presents a structure based on noncoherent-SPRT algorithm for the sequence acquisition under large frequency offset and low signal to noise ratio in DS/SS systems. 該文研究大頻偏低信噪比情況下DS/SS系統中的序列捕獲問(wèn)題,介紹了一種基于非相干序貫檢測算法的捕獲結構。
- In this paper, three Data-Aided (DA) open-loop frequency offset estimation algorithms-Kay, Fitz, and Luise and Reggiannini(L &R) algorithms - are analyzed. 分析了基于最大似然準則的3種典型數據輔助(DA)開(kāi)環(huán)頻偏估計算法:Kay算法、Fitz算法和L &R算法。
- It is required that the length of each hop is at least 80 symbols to achieve effective timing error and frequency offset estimation as to demodulate the signal without any delay. 仿真結果表明每跳要傳輸80比特以上，才能夠完成位定時(shí)與載波同步并實(shí)時(shí)解調。
- Frequency offset is captured by utilizing the repetition structure of training frame and eliminating the channel impulse response influence and the time error influence. 算法利用訓練幀結構的循環(huán)重復性特點(diǎn)，剝離信道的影響和定時(shí)偏差的影響，完成頻偏的捕獲。
- In order to avoid such problems as symbol sliding, phase shift of pseudorandom noise code and carrier phase offset, an improved method of frequency offset estimation is proposed. 摘要為避免采樣頻率偏差給衛星導航接收機帶來(lái)的符號位滑動(dòng)、偽隨機噪聲碼相位移動(dòng)和載波相位偏差等問(wèn)題，提出了一種改進(jìn)的頻率偏差估計方法。
- Simulation results show that the accuracy of timing synchronization and the estimate range of the frequency offset outperform those of the other available methods. 仿真結果表明所提方法的符號同步偏移估計精度和頻偏估計范圍均優(yōu)于已有的同步方法。
- Based on the timing synchronization, the PN weighted factor in the training symbol is removed, and the renewed training symbol is used to estimate the frequency offset. 在符號同步的基礎上，利用消去新訓練符號中偽隨機加權因子的數據序列進(jìn)行頻偏估計。
