At the output of beamforming and the receiver channel, with a band-pass filter at the intermediate frequency (IF), the received signals are available for further processing. They are at this stage continuous analogue signals. For digital processing we need sampled values of the orthogonal components I and Q as described in Chapter 2 with (2.1). In this chapter we will discuss the necessary sampling rate and methods to derive the orthogonal components I and Q.

Chapter Contents:

• 6.1 Analytical signal
• 6.2 Sampling and interpolation
• 6.3 Extraction of the components I and Q in digital format
• 6.4 Third-order intercept point and dynamic range
• References

Inspec keywords: band-pass filters; signal sampling; array signal processing

Other keywords: signal sampling; signal digitisation; band-pass filter; digital processing; beamforming output; continuous analogue signals; intermediate frequency; IF; orthogonal components; receiver channel

Subjects: Signal processing theory; Filtering methods in signal processing