Performance analysis of high order modulation schemes in the wireless communication system

초록

This paper compares that the analyzed efficiency about the case which will adopt the modulation method of the high-order unit for raising a data rate from wireless telecommunication system. The quadrature-carrier AM (QAM) of the rectangular square form which is used mainly in existing have excellent bit-error rate (BER) efficiency from it compares in different modulation method and the quality. But the number of amplitude increases to follow, the dynamic range of transfer & receiver signal increases and the limit gets in selection of the amplifier, the error occurrence rate from amplification process increases. Amplitude phase-shift keying (APSK) modulation is visible to a BER and the performance degradation of some. quadrature-carrier AM (QAM). It compares QAM. But because of dynamic range (DR) from transmission signal has the getting a profit specially codedivision multiple access (CDMA) or orthogonal frequency division multiplexing (OFDM) with the multi signal transfer as sum of signal. It is useful in modulation method of the higher-order unit for a system. Also the use of the non-linear amplifier where the case power efficiency of the APSK is good is possible and there is a possibility of getting a big profit even from the system embodiment side. This paper simulates it led from In universal mobile telecommunication system terrestrial radio access (UTRA) time division duplex (TDD) [1][2] system environment and it gave proof.