Table 1 Comparison between widely used radar implementations and the partially coherent radar

Range resolution dependence on bandwidth

\(\frac{c}{{2 \ast BW}}\)

\(\sim \frac{c}{{2 \ast BW}}\) Or even worse when using windowing techniques

\(\sim \frac{c}{{2 \ast BW}}\)

✓ Free of bandwidth limitations

Short-range target detection

Requires large bandwidth for short range detection, and thus fast ADC (analog-to-digital converter)³⁵

✓ Does not suffer from blind range due to its simultaneous transmit and receive scheme^29,35

Requires large bandwidth for short range detection, and thus very fast ADC, or low-dynamic range^14,35

✓ Does not require large bandwidth due to smart correlation detection algorithm

Long-range target detection

Demands compression techniques to be used for long range, and thus use larger bandwidth, making it more vulnerable to manmade noise³⁶

Has a built in trade-off between range and resolution, which cannot be improved²⁹

✓ Has no restrictions on range

✓ Has no restrictions on range

Exploiting Doppler effect for measurement of moving targets

✓ Widely used to extract Doppler information. Fast targets do not severely affect range accuracy

✓ Widely used to extract Doppler information. Fast targets do not severely affect range accuracy

Cannot be used for high speed targets³⁷

✓ Can be used to extract Doppler in the same manner as pulsed and FMCW radars. Fast targets (over 200 km/h) can affect performance and require smarter algorithms

Other limitations/advantages

Leakage from FMCW signal can impair the receiver especially at low received signal levels. Phase noise degrades performance³⁵

Most applications require precise controlled delay lines, which have high insertion loss and are frequency depended³⁸

✓ Can be used even in sub 1 GHz implementations