Which multiplexing technique allocates different frequency bands to different users? A) TDMA B) CDMA C) FDMA D) None of the above

C) FDMA

Fill in the blank: In ______, time slots are divided among users so that only one user accesses the channel at a time.

Time Division Multiplexing (TDMA)

True or False: Code Division Multiple Access (CDMA) requires different frequencies for different users.

False. CDMA uses unique codes for each user while transmitting at the same frequency.

What is the Hamming distance between two codewords? Provide a concise definition.

The Hamming distance between two codewords is the number of positions in which they differ.

Riddle: I help separate signals in a shared channel, using time, frequency, or codes. What am I?

Multiplexing

Which type of coding can correct errors? A) Block codes B) Convolutional codes C) Both A and B D) None of the above

C) Both A and B

Fill in the blank: The objective of channel encoding is to reduce the effect of ______.

Channel noise

True or False: The minimum distance of a linear code determines its error detection and correction capabilities.

True

What is the generator matrix in a linear block code?

The generator matrix is a matrix used to encode data into codewords in a linear block code.

Riddle: I am a technique that maximizes signal quality in noise, often used in radar. What am I?

Matched filter

Which of the following is true for Time Division Multiple Access (TDMA)? A) It can only multiplex digital signals B) It requires infinite bandwidth C) It allocates time slots to users D) None of the above

C) It allocates time slots to users

Fill in the blank: The syndrome of a received word is calculated as ______.

RHᵀ

True or False: In digital communication, noise is considered a beneficial element that enhances signal quality.

False. Noise is an unwanted form of energy that interferes with signal reception.

What is the minimum distance of a linear code? Provide a concise definition.

The minimum distance is the smallest Hamming distance between any pair of distinct codewords in the code.

Riddle: I am the measure of how different two codewords are, represented as the count of differing positions. What am I?

Hamming distance

Which type of modulation varies the phase of the carrier signal according to digital data? A) FSK B) ASK C) PSK D) None of the above

C) PSK

Fill in the blank: The probability of error for digital modulation schemes is typically measured by ______.

Signal-to-Noise Ratio (SNR)

True or False: The matched filter is optimal for all types of noise, including Gaussian noise.

True

What is the primary function of the parity-check matrix in coding theory?

The parity-check matrix is used to detect errors in received codewords.

Riddle: I filter signals to enhance quality, but I am not a sieve. What am I?

A filter (specifically a matched filter)