Radio Frequency (RF) basics.

This is a simple tutorial to present fundamentals to characterize radio receiver performance.

Following characteristics of RF are discussed in detail in this section:

(SNR), Noise Factor (F),  Noise Figure (NF) & Cascaded F.

Third order IM products and Cascade IP3 calculations. 

 IP3 (Third Order Intercept) point. Discussions with a plot.

† Radio receiver characterization - Desensitization, Cross-modulation, spurious outputs, gain control and noise (thermal, shot, etc.). 

† How to select most appropriate antennas for transmit and receive over Radio Frequency (RF).

† Antenna pattern, Gain, and Polarity. Discussions related to Antenna selection guide.

Discuss SNR, Noise Factor and Noise figure next.

LTE - 4G Wireless Technology

Digital fundamentals.

Interview Questions.

SNR :- Signal to Noise Ratio

It is the ratio of Signal power to Noise power.

SNR = Signal Power / Noise

Noise Factor:

Noise Factor is ratio of input SNR to the output SNR of a receiver.

Refer Noise Factor for Cascaded RF system from here.

Noise Figure:

Noise Figure is a measure of degradation of SNR when a signal passes through a system.

If there is no noise (ideal) in a system then we will have following:-

F = 1

NF = 0

So, NF is always greater than or equal to 1


Verilog Tutorial.

LTE Tutorial.

Memory Tutorial.

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