Lastly, support of location based services will be required (i.e., GPS,
and so on).
Relative design issues are discussed in [40] and [41] for Reconfigurable Multistandard Terminals.
As mentioned in the references used in this section, creating a multistandard terminal is challenging
in and of itself. Placing additional constraints such as being cost-competitive, size and power
aggressive designs make this task even more difficult. A simple argument is that different standards
have differing levels of requirements; creating a device that assumes the most challenging requirements
for all applications will essentially overdesign the terminal and potentially lose certain design
goals.
In Fig. 6.51 we provide a high-level block diagram highlighting certain features to be considered
when designing SDR applications. We have chosen to split the design space into three areas: Spectral
Conversion (RF), Baseband??”Hardware and Software.
RECEIVER DIGITAL SIGNAL PROCESSING 339
RF
Section
Programmable:
Bandwidths
Channels
Gains
Powers
Configurable
Hardware
Configurable
Software
Programmable:
Sampling Rates
Filters
Dynamic range
AFE control
Programmable:
Signal processing algorithms
Modulation formats
FEC methods
Protocol processing
FIGURE 6.
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