| Summary: | 碩士 === 國立臺灣科技大學 === 電機工程系 === 104 === LTE-Advanced proposes carrier aggregation techniques which utilizes aggregated multiple carriers to increase the bandwidth and achieve high data rate. In practice, LTE-Advanced uplink systems adopt single carrier frequency division multiple access (SC-FDMA) which has a low Peak to Average Power Ratio (PAPR) characteristic. However, this characteristic will be lost as the number of aggregated carrier increasing. Therefore, we adopt the Partial Selected Mapping (PSLM) technique to reduce PAPR. PAPR will reduce by multiplying phase factor which represents as the side information (SI) at the receiver side. The receiver must have received the side information which can recover the signal’s phase and Systems will decrease data rate by extra transmitting SI.
To avoid this situation, our structure adopts Physical Uplink Shared Channel (PUSCH), its time slot structure includes reference symbol which be used for channel estimation. Therefore, we use the reference symbol to substitute the SI to achieve without directly sending SI. And we also use reference symbol’s characteristics to estimate the phase factor and recovery the signal’s phase by estimated phase. In this thesis, we will discuss the two phase detection techniques without using side information and modified them. In addition, we propose a new technique without using side information. Then, we will simulate the BER performance of all methods in different channel models, equalizers, phase candidates and number of aggregated carriers. Further, we will compare all methods in computational complexity.
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