  The signal recovery performance of the rectangular-type Analog Joint
Source-Channel Coding (AJSCC) is analyzed in this work for high and medium/low
Signal-to-Noise Ratio (SNR) scenarios in the wireless sensing systems. The
analysis and derivations of the medium/low SNR scenario are based on the
comprehensive listing of all the signal variation cases in the
three-dimensional signal mapping curve of the rectangular-type AJSCC.
Theoretical formulations of Mean Square Error (MSE) performance are derived for
both analog sensing and digital sensing systems with rectangular-type AJSCC.
Evaluation results indicate that, there are optimal parameters in the
rectangular-type AJSCC to minimize the signal recovery MSE performance at high
and medium/low SNR scenarios. In addition, the performance of digital sensing
with low-resolution Analog-to-Digital Conversion (ADC) is compared with analog
sensing for both high and medium/low SNR scenarios in this work. The
theoretical and evaluation results have practical value to the wireless sensing
system designs based on the rectangular-type AJSCC.
