Wireless Communication Research Paper

1.1 Wireless communication

There are various generation in the wireless system. We are running with the 4 G wireless system which is more focused on the high speed data communication. The demand for higher capacity with low error has raised manifolds, mainly due to cellular telephony although expected to be soon eclipsed by wireless data applications. The various digital signal processing algorithms like IFFT, FFT can be implemented with the advent of modern chip technology. Due to the success of 2G wireless communication standards especially CDMA technique it has been shown that communication ideas can be implemented in practice [1]. The research push in the past decade has led to a much better-off set of perspectives and tools on how to

• Second, unlike in the wired world where each transmitter and receiver pair can often be thought of as an isolated point-to-point link and wireless users communicate over the air and there is significant interference among them. The interference can be between transmitters communicating system with a common receiver (e.g., uplink of a cellular system), are between signals from a single transmitter to multiple receivers process (e.g., downlink of a cellular system),

1.2 Multicarrier Modulation Technique

Orthogonal Frequency division multiplexing (OFDM) is a type of multicarrier modulation scheme. OFDM systems have lot of advantages of system in providing high data rates with sufficient robust against radio channel impairments. OFDM has been adopted in several wireless network standards such as digital audio broadcasting (DAB), digital video broadcasting (DVB-T), the IEEE 802.11a LAN (local area network) standard and the IEEE 802.16a MAN

In this probabilistic approach certain systems have been proposed through researchers. These include clipping, coding and signal scrambling scheme. Under the heading of signal scrambling method there are two schemes included. Which are Partial transmit sequence (PTS) and Selected Mapping. Although some techniques of PAPR reduction have been summarized in [5], it is still indeed needed to give a comprehensive review including some motivations of PAPR reductions, to compare some typical methods of PAPR reduction through theoretical analysis and simulation results directly, and such as power saving. An effective PAPR reduction technique should be given the best trade-off between the capacity of data rate loss, PAPR reduction and transmission power, implementation complexity and Bit-Error-Ratio (BER) performance etc. In this paper, firstly the distribution of PAPR based on the characteristics of the OFDM signals are investigated then typical PAPR reduction techniques are analyzed.

1.4 Organization of thesis

The chapter of thesis is organizing to get the complete description of the work including literature review, method, result and their analysis. The chapter wise organization of thesis is given as below,

Chapter: 1 This chapter gives introduction of the wireless communication, wireless standards , MIMO-OFDM etc.

Chapter: 2 This chapter gives wide literature survey about the OFDM