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10
waveform viewers of system level simulators as postprocessing. To provide
such functionality in the Cadence Analog Artist waveform viewer an
appropriate generator is delivered. The input to the eye-diagram generator is
the I or Q component of a complex baseband signal. The eye-diagram
generator provides two outputs labeled "y-axis" and "x-axis". The eye-
diagram is generated by plotting the y-axis output against the x-axis output
in the Analog Artist waveform viewer. An example of an eye-diagram is
shown in Figure 10-14. To generate eye-diagrams the transient simulation
must be used.
Figure 10-14. Eye-diagram
10.4
Modeling and Simulation of a WLAN Receiver
This design example is based on a complex system level architecture for
a wireless high-speed data transmission conforming to the WLAN standard
IEEE 802.11a. It has been simplified to concentrate on the main parameters
and to keep the example practical. Figure 10-15 shows the WLAN receiver
corresponding to a double conversion receiver architecture.
This example is the same as that used in Chapter 9. The input signal and
block specification are described there. While it is treated there extensively
at system level, we focus here on circuit level simulations.
The task of the WLAN receiver is to receive a broadband signal at radio
frequency from the antenna and to transform the signal (for example in
frequency, power and phase) for digital baseband processing. The incoming
signal is assumed to be an OFDM (Orthogonal Frequency Division
Multiplex) signal. It is first amplified by an LNA and then downconverted to
baseband at two mixer stages working at the same local oscillator (LO)
frequency.
Summary :
Eye-diagram 10.4 Modeling and Simulation of a WLAN Receiver This design example is based on a complex system level architecture for a wireless high-speed data transmission conforming to the WLAN standard IEEE 802.11a. The task of the WLAN receiver is to receive a broadband signal at radio frequency from the antenna and to transform the signal (for example in frequency, power and phase) for digital baseband processing.
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signal,example,eyediagram,leel,wlan,frequency,receier,waeform,system,generator,figure,baseband,chapter