Wireless Networking · Unit 6
Signal Processing and Equalization
Exam-focused notes for Signal Processing and Equalization (Wireless Networking, BIT357): what the TU syllabus asks and how it has actually been tested, with 4 solved past questions from this unit.
What this unit covers
- Inter symbol interference
- Equalization concept and necessity
- Equalization algorithms
- Power spectral density
- Power spectral analysis
- OFDM technique and working
- Diversity techniques
- Maximum ratio diversity
- Equal gain diversity
Power spectral density
What is power spectral and power spectral density? Discuss the working of QAM and OFDM techniques with example.[10]
Power Spectral Density is a measure that describes how the power of a signal is distributed across different frequencies in the frequency domain. Definition: - PSD represents the power per unit bandwidth (W/Hz) as a function of frequency - Mathematically: S...
Full solved answer →Diversity techniques
Why diversity is employed in wireless communication? Discuss the concepts of maximum Ratio and Equal Gain Diversity. [5]
Diversity is a fundamental technique used in wireless communication systems to combat the detrimental effects of fading and multipath propagation. The primary reasons for employing diversity are: 1. Combating Fading: Wireless channels experience severe fadi...
Full solved answer →Inter symbol interference
Explain inter symbol reference and Raised Cosine Pulse in detail. [5]
Definition: Inter-symbol interference occurs when the transmitted signal of one symbol extends into the time interval of adjacent symbols, causing distortion and potential errors at the receiver. This happens because the communication channel has limited ba...
Full solved answer →Equalization concept and necessity
What is meant by equalization? How equalization is done in wireless communication? Discuss any one algorithm. [5]
Equalization is a signal processing technique used to counteract the effects of channel distortion and intersymbol interference (ISI) in wireless communication systems. It aims to restore the transmitted signal to its original form by compensating for the d...
Full solved answer →Make Unit 6 stick
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