Advanced wireless communications : 4G technologies - download pdf or read online

By Savo G Glisic

ISBN-10: 0470867760

ISBN-13: 9780470867761

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27 2−6 . 22 Upper bounds to the soft ML decoding bit error probability of different convolutional codes of rate 1/2. 23 Upper bounds to the soft ML decoding bit error probability of different convolutional codes of rate 1/3. 27 2−5 . In other words, we find that the efficiency of the Rc = 1/3 code is higher by a factor of two. 2. These results can be used for calculation of reconfiguration efficiency for different types of code. 3 Systematic recursive convolutional codes Systematic convolutional codes generated by feed-forward encoders yield, in general, lower free distances than non-systematic codes.

9 Two equivalent schemes for the convolutional encoder of the (3, 1, 3) code. 10 Convolutional encoder for the (3, 2, 2) code. notation that might be more convenient:  g1,1  .. G= . 10. 10. 12 General block diagram of a convolutional encoder in parallel form for an (n 0 , k0 , N ) code. 11. 14. 9 one can verify, and then generalize for any encoder with arbitrary n 0 and k0 = 1, that, for each input digit u i , n 0 digits will be generated in accordance with: (xi1 , xi2 , xi3 , . . 14) k=1 This relation has the form of convolution, hence the name convolutional coding.

Chosen to optimize performance. For performance prediction purposes, most of the time the ∞ data sequence {d (k) j } j=−∞ is modeled as a wide-sense stationary random process composed of equally likely symbols. For data, a pulse position data modulation is used. 23 Single band UWB signal. 24 Multiband UWB signal. The antenna/propagation system modifies the shape of the transmitted monocycle ωtr (t) to ωrec (t) on its output. 17. The optimum receiver for a single bit of a binary modulated impulse radio signal in additive white Gaussian noise (AWGN) is a correlation receiver: ‘decide d0(1) = 0’ if pulse correlator output = α j (u) Ns −1 j=0 τ1 +( j+1)T f τ1 + j T f r (u, t)υ t − τ1 − j T f − c(1) j Tc dt > 0 test statistic = α(u) where υ(t) = ωrec (t) − ωrec (t − δ).

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Advanced wireless communications : 4G technologies by Savo G Glisic


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