An adaptive threshold computation method for pilot symbol assisted iterative channel estimation in coded OFDM systems is considered. The proposed threshold computation method is based on calculating a particular threshold for each data packet in order to select the reliable decoder output symbols to improve the system bit error rate performance. The adaptive threshold computation approach utili...

Type-II Hybrid-ARQ (Type-II HARQ) has been shown, under certain circumstances, to increase the efficiency and reduce loss of data transmissions over a wireless channel. However, it is difficult to predict how it will perform when transmission symbol errors are correlated. We present a computationally efficient approach to the performance evaluation of packet transmissions over a wireless link e...

In Cooperative Wireless Communication, system performance decreases due to the improper estimation of the channel. We analyzed MIMO-STBC based Decode and Forward (DF) Cooperation Communication System, considering the effect of error, arises due to the improper estimation of channel. We have considered Decode Forward (DF) based MIMO Space Time Block Code (STBC) Cooperative Communication Network ...

Abstract-The main objective of this paper is to compare block transmission system performance analytically for Code Divisional Multiple Access (CDMA) modulations in Generalized Multicarrier environment against linear modulation techniques for both single user and multiuser. The effectivity of GMC-CDMA for multiuser will also be judged for different Direct Sequence CDMA (DS-CDMA) such as MC-CDMA...

Fiber Distributed Data Interface (FDDI) is a 100 megabits per second ber optic local area network (LAN) standard being developed by the American National Standard Institute (ANSI). We analyze the impact of various design decisions on the error detection capability of the protocol. In particular, we quantify frame error rate, token loss rate, and undetected error rate. Several characteristics of...

Abstract Error correcting codes can play a key role in improving the efficiency and reliability of wireless communications. Concatenated codes have the advantages that: 1) breaking the task into stages simplifies decoding, and 2) performance is good against clustered bit errors, fading and bursty interference. Reed-Solomon codes (maximum distance codes) have been popular as an outer code of con...

FiberDistributed DataInterface (FDDI) is a100megabits per second ber optic local area network (LAN) standardbeing developed by the AmericanNational Standard Institute (ANSI). We analyze the impact of various designdecisions onthe error detectioncapabilityof the protocol. Inparticular, we quantifyframe error rate, tokenloss rate, andundetectederror rate. Several characteristics of the 32-bit fra...

This work studies the robust design of linear precoding and linear/ non-linear equalization for multi-cell MIMO systems in the presence of imperfect channel state information (CSI). A worstcase design approach is adopted whereby the CSI error is assumed to lie within spherical sets of known radius. First, the optimal robust design of linear precoders is tackled for a MIMO interference broadcast...