Digital Communications

Law gives the relationship between time, information capacity, and bandwidth.

• I = ktB

• C = 2B log2M

• C = B log2(1 + S/N)

• SR = 2fmax

Ignoring noise, the _________________________ theorem gives the maximum rate of data transmission for a given bandwidth.

• I = ktB

• C = 2B log2M

• C = B log2(1 + S/N)

• SR = 2fmax

The ____________________ limit gives the maximum rate of data transmission for a given bandwidth and a given signal-to-noise ratio.

• I = ktB

• C = 2B log2M

• C = B log2(1 + S/N)

• SR = 2fmax

The ____________________ Rate is the minimum sampling rate for converting analog signals to digital format.

• I = ktB

• C = 2B log2M

• C = B log2(1 + S/N)

• SR = 2fmax

Natural Sampling does not use:

• a sample-and-hold circuit

• true binary numbers

• a fixed sample rate

• an analog-to-digital converter

The immediate result of sampling is:

• a sample alias

• PAM

• PCM

• PDM

Foldover distortion is caused by:

• noise

• too many samples per second

• too few samples per second

• all of the above

Which is true about aliasing and foldover distortion?

• They are two types of sampling error.

• You can have one or the other, but not both.

• Aliasing is a technique to prevent foldover distortion.

• They are the same thing.

Quantizing noise (quantization noise):

• decreases as the sample rate increases

• decreases as the sample rate decreases

• decreases as the bits per sample increases

• decreases as the bits per sample decreases

The dynamic range of a system is the ratio of:

• the strongest transmittable signal to the weakest discernible signal

• the maximum rate of conversion to the minimum rate of conversion

• the maximum bits per sample to the minimum bits per sample

• none of the above