Hence performance improvement techniques are discussed that allow the system designer to be
able to create a reliable communication system. Interleaving and de-interleaving operations are provided
to emphasize their ability to redistribute bursts of errors. Forward error correction techniques
are discussed in depth to compare block codes, convolutional codes, Reed-Solomon codes, turbo
codes, and puncturing methods. An attempt to compare their performances to concatenated coding
is undertaken to emphasize the proximity of the operating point to the Shannon capacity bound. Next,
a treatment on spatial antenna diversity-combining techniques including switching, maximal ratio
combining, and optimal combining is provided. The BER performance of all these techniques is
compared and theoretical equations are provided where necessary. Lastly, two methods of space-time
transmit diversity are discussed. At this point a link budget example can be leveraged into the discussions
and used as a demonstration vehicle as to where performance improvements can have significant
impact on the overall system.
Chapter 6 discusses various digital signal-processing algorithms typically used in the wireless
digital communications systems.
Pages:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25