CODE SHIFT KEYING IMPULSE MODULATION FOR UWB COMMUNICATIONS

  ULTRA wideband impulse radio (UWB-IR) technology is an attractive choice to support high-rate data communications and low-rate

precise location and ranging. Time-hopping M-ary pulse position modulation has been considered as the main modulation format to

meet the demand for higher data rates . In the conventional implementation of MPPM, a single pulse is transmitted in one of the fixed

M consecutive pulse positions. In a multipath channel, energy collected from consecutive pulse locations may be interfered by a large

portion of multipath-delayed received pulses. This may generate noticeable interference components for the M decision variables,  &

may affect the system performance. To  reduce  the effect  of interference components,one approach is to randomize the consecutive

pulse transmit locations using M orthogonal TH codes.

                                                                                                                                                                                                            

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DESIGN AND ANALYSIS OF BIT INTERLEAVED CODED SPACE-TIME MODULATION

    Bit interleaved coded space time modulation (BICSTM) is an attractive strategy to achieve high power and Bandwidth efficiency over

multiple  input  and  multiple  output  (MIMO)  fading  channels  due to coding and diversity gains promised by the serial concatenation

of an outer convolutional code, a bitwise interleaver and an inner high order space time modulation (STM). In this project, BICSTM with

iterative decoding  (BICSTM-ID)  including  non-iterative  decoding  as  a  special case is considered. For designing the inner STM, two

parameters based on bit-wise pairwise  error  probabilities (bPEP)  for the cases with and without a-priori knowledge are proposed as

new measures for designing labeling rules for the STM codewords set suited to iterative decoding. On the other hand , the  BICSTM-ID

scheme is analyzed from an information theoretical aspect, and Information Processing Characteristic (IPC) analysis is  developed for

MIMO  systems  in  order  to  fully  characterize  the  BICSTM-ID  scheme  based  on a  new  equivalent  model of combined binary input

channels.

 
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AN IMPROVING MODEL WATERMARKING WITH IRIS BIOMETRIC CODE

                     The project deals with new technology for perfect safety in specific area of the human deal. The Problem same important with

new technology - internet,  all  multimedia author's system, video watch of the system, audio production and etc. . In this directions will lay

each leading security system and modern password with electronic document and key system of the passage  with modern cryptographic

system. The  problem  with  watermarks,  used biometric code for perfect the algorithm of the watermark to safety. This is designed  using

discrette  wavelet transformation  algorithm, which  sends itself in wise Haar for performing in water sign.The DWTis relatively new notion,

which  wants  to change the purpose (Or Filler) Broad used discrette transformation of the cosine - (DCT)  that uses itself in Compression

JPEG. The Purpose a method on this in use biometric discriminating line is provided digital scene. The Copyright Protection digital scene

offers the method with use one Bio measured feature, and as follows: iris-play-off owner, who identifies his(its) synonymy.

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