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Orthogonal frequency-division multiplexing (OFDM) —
essentially identical to Coded OFDM (COFDM) and Discrete multi-tone modulation (DMT) — is a frequency-division multiplexing (FDM) scheme utilized as a digital multi-carrier modulation method. A large number of closely-spaced orthogonal...
differnces between n-cdma and w-cdma
North American CDMA
(cdmaOne)
�� Code Division Multiple Access
0 all users share same frequency band
0 discussed in detail later as CDMA is basis for 3G
�� Qualcomm demo in 1989
0 claimed improved capacity & simplified planning...
cross correlation pn sequence
Pseudo Noise Sequences
The Pseudo Noise Sequence is zero-mean additive White Gaussian Noise (AWGN) has the same power spectral density GWGN (f) for all frequencies and non orthogonal sequence that consists of a deterministic and periodical signal, it acts as a...
I need book which name is:
Digital communication satellite/earthstation engineering
Author
Dr.Kamilo Feher
anyone send me the book or give me the link to download it
I will Thank to him
please help me quickly
my email is : sonysony_110@yahoo.com
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