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TETRA Air interface specifications – Overview

Krishna Sankar15 years ago13 years ago51 mins

TETRA (TErrestrial Trunked RAdio) is a wireless specification intended to be used by government agencies, public health services, rail transport, military etc. TETRA specification comes from ETSI (European Telecommunication Standards Institute). We plan to start a post series on the building blocks of TETRA physical layer and radio specifications and this is the first post…

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Minimum frequency spacing for having orthogonal sinusoidals

Krishna Sankar17 years ago13 years ago81 mins

In this post, the objective is to figure out the minimum separation between two sinusoidals having frequencies , of duration each to be orthogonal. Let the phase difference between the sinusoidals is where can take any value from to (Refer Example 4.3 [DIG-COMM-SKLAR]). For the two sinuosidals to be orthogonal,

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Modifying transmit signal

Krishna Sankar18 years ago13 years ago11 mins

In DSP-Proakis, I found the problem 2.56 interesting as it provides insight into delta modulation. The task is to show that, where is any discrete time signal and is the unit step function.

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