Earticle

The concatenated codes or the convolutional codes which are often adopted in the communication systems are originally designed to overcome the random independent noise. As such, the performance is severely degraded over the bursty impulsive noise channels. In this paper we compare the bit error rate (BER) performance of the various different channel coding schemes with interleaver over the bursty impulsive noise channels. In particular, we focus on the existence of the bit level and/or the byte level interleavers and show from the extensive simulations that the performance can be different depending on the existence of the interleaver. From our simulations we can see that the concatenated codes with the byte interleaver between the inner and outer codes and the bit interleaver after the inner code gives the best performance among them. For the schemes which include the bit level interleaver, we also observe the interleaving gain versus the interleaver span so that it can be a good guideline to design the communication systems with the concatenated codes.

This Paper suggests efficient design method which is used by Bit_Inerleaver in the IEEE 802.15,3.a. Bit_Interleaver is consist of Symbol_Interleaver and Tone_Interleaver Each Interleaver is designed by using memory. In other to resolve burst error, Block Interleaver is using different leading and writing address for mixing the data. However This method has a different reading and writing memory address to realize Block Interleaver so this schematic is some complex. This Paper suggests efficient and simple Bit_Interleaver Method which classify the memory of Bit_Interleavr to reduce complexity of shcemeatic.