Performance Evaluation of Phase Optimized Spreading Codes in Non Linear DS-CDMA Receiver

Bhanja, Ipsita (2006) Performance Evaluation of Phase Optimized Spreading Codes in Non Linear DS-CDMA Receiver. MTech by Research thesis.



Spread spectrum (SS) is a modulation technique in which the signal occupies a bandwidth much larger than the minimum necessary to send the information. A synchronized reception with the code at the receiver is used for despreading the information before data recovery. Bandspread is accomplished by means of a code which is independent of the data. Bandspreading code is pseudo-random, thus the spread signal resembles noise. The coded modulation characteristic of SS system uniquely qualifies it for navigation applications. Any signal used in ranging is subject to time/distance relations. A SS signal has advantage that its phase is easily resolvable. Direct-sequence (DS) form of modulation is mostly preferred over Frequency Hopping system (FH) as FH systems do not normally possess high resolution properties. Higher the chip rate, the better the measurement capability. The basic resolution is one code chip. Initially, some existing code families e.g. Gold, Kasami (large and smal...

Item Type:Thesis (MTech by Research)
Uncontrolled Keywords:Spread spectrum, Bandspread, Direct-sequence
Subjects:Engineering and Technology > Electronics and Communication Engineering > Data Transmission
Divisions: Engineering and Technology > Department of Electronics and Communication Engineering
ID Code:140
Deposited By:Shipra Awasthi
Deposited On:06 May 2009 23:38
Last Modified:14 Jun 2012 16:39
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Supervisor(s):Patra, S K

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