orthogonal property造句
例句與造句
- in term of the orthogonal property of alamouti scheme and the character of the ofdm system equivalent model expression of receiver signal for stbc-ofdm system was obtained by flexible transform method so that the inverse of matrix was avoided using direct-decision mode and the complexity of computation and receiver was decreased . the simulation results show the validity and efficiency of the proposed receiver . ( 6 ) an adaptive equalization algorithm used in space-time block coded ofdm ( stbc-ofdm ) system with alamou
該算法充分利用了alamouti編碼的正交特性和多發(fā)射天線ofdm系統(tǒng)特點(diǎn)，通過靈活的變換對接收信號進(jìn)行等價(jià)的表示；通過對11矩陣求逆的研究，將塊最小二乘遞推算法（brl）中的zkxzk的矩陣求逆分解為k個(gè)2x2矩陣的求逆，從而降低了自適應(yīng)算法的運(yùn)算量和接收機(jī)的復(fù)雜度。 - firstly, in wireless environment, receiver has no know the time delay between transmitter and itself . in ofdm system, ofdm data is transmitted as one symbol, so in order for correct demodulation, the correct start of symbol should be got from ofdm system to reduce the effect of isi . secondly, the high frequency utilization in ofdm is based on the orthogonal properties of sub carriers . if frequency offset is generated, the orthogonal properties among sub carriers will lost, that will cause inter carrier interference ( ici ) and high ber of system
ofdm技術(shù)也存在著一些缺陷,首先,在無線環(huán)境中傳輸?shù)膐fdm信號對定時(shí)要求高,為了減少碼間串?dāng)_(isi)影響,必須從接收信號中提取出正確的符號起始位;其次,ofdm系統(tǒng)對頻率偏移敏感,ofdm技術(shù)的高頻譜利用率和傳輸可靠性均以子載波的正交性為基礎(chǔ),如果接收機(jī)和發(fā)射機(jī)之間發(fā)生頻率偏移,子載波之間就會(huì)失去正交性,導(dǎo)致嚴(yán)重的子載波間干擾(ici),降低系統(tǒng)性能。 - firstly, in wireless environment, receiver has no know the time delay between transmitter and itself . in ofdm system, ofdm data is transmitted as one symbol, so in order for correct demodulation, the correct start of symbol should be got from ofdm system to reduce the effect of isi . secondly, the high frequency utilization in ofdm is based on the orthogonal properties of sub carriers . if frequency offset is generated, the orthogonal properties among sub carriers will lost, that will cause inter carrier interference ( ici ) and high ber of system
ofdm技術(shù)也存在著一些缺陷,首先,在無線環(huán)境中傳輸?shù)膐fdm信號對定時(shí)要求高,為了減少碼間串?dāng)_(isi)影響,必須從接收信號中提取出正確的符號起始位;其次,ofdm系統(tǒng)對頻率偏移敏感,ofdm技術(shù)的高頻譜利用率和傳輸可靠性均以子載波的正交性為基礎(chǔ),如果接收機(jī)和發(fā)射機(jī)之間發(fā)生頻率偏移,子載波之間就會(huì)失去正交性,導(dǎo)致嚴(yán)重的子載波間干擾(ici),降低系統(tǒng)性能。 - It's difficult to find orthogonal property in a sentence. 用orthogonal property造句挺難的