By Savo G Glisic
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Extra resources for Advanced wireless communications : 4G technologies
The boldface path corresponds to the input sequence 11011. The maximum value of Dr will be referred to as the reconﬁguration range and the maximum value of the gain g12 as the adaptation range. 1 Punctured convolutional codes /code reconﬁgurability The increase of complexity inherent in passing from rate l/n 0 to rate k0 /n 0 codes can be mitigated using so-called punctured convolutional codes. A rate k0 /n 0 punctured convolutional code can be obtained by starting from a rate l/n 0 and deleting parity check symbols.
18. The Ultra Wide Band radio will be discussed in detail in Chapter 8. In this section we will initially deﬁne only a possible signal format. 11) j=−∞ where t (k) is the kth transmitter’s clock time and T f is the pulse repetition time. The transmitted pulse waveform ωtr is referred to as a monocycle. 19 Spectrum of a TH signal. 20 Spectra of (a) pseudorandom DS and (b) random DS signals. called a time-hopping sequence. This provides an additional time shift of c(k) j Tc seconds to the jth monocycle in the pulse train, where Tc is the duration of addressable time delay bins.
35) By introducing the following notation p(yk | 0) p(yk | 1) p(y1 j | 0) ≡ log p(y1 j | 1) λk ≡ log λ1 j p(y2m | 0) λ2m ≡ log p(y2m | 1) pa (0) λa ≡ log pa (1) j = 1, . . 36) m = 1, . . 34) can be represented as: π(0) 2k = 0 .. 30 Block diagram of the iterative decoding scheme for binary convolutional codes. 31 Block diagrams of the encoder and iterative decoder for serially concatenated convolutional codes. 40) and the MAP decision is made according to the sign of λk . 39) are available in standard literature [102–112], the most relevant being the original work by Berrou .
Advanced wireless communications : 4G technologies by Savo G Glisic