What property of PN code makes them suitable for use in spread spectrum communication? Solution Pseudo random noise is used in some electronic musical instruments, either by itself or as an input to subtractive synthesis, and in many white noise machines. In spread-spectrum systems, the receiver correlates a locally generated signal with the received signal. Such spread-spectrum systems require a set of one or more \"codes\" or \"sequences\" such that Like random noise, the local sequence has a very low correlation with any other sequence in the set, or with the same sequence at a significantly different time offset, or with narrow band interference, or with thermal noise. Unlike random noise, it must be easy to generate exactly the same sequence at both the transmitter and the receiver, so the receiver\'s locally generated sequence has a very high correlation with the transmitted sequence. In a direct-sequence spread spectrum system, each bit in the pseudorandom binary sequence is known as a chip and the inverse of its period as chip rate; comparebit rate and symbol rate. In a frequency-hopping spread spectrum sequence, each value in the pseudo random sequence is known as a channel number and the inverse of its period as thehop rate. FCC Part 15 mandates at least 50 different channels and at least a 2.5 Hz hop rate for narrow band frequency-hopping systems. GPS satellites broadcast data at a rate of 50 data bits per second – each satellite modulates its data with one PN bit stream at 1.023 million chips per second and the same data with another PN bit stream at 10.23 million chips per second. GPS receivers correlate the received PN bit stream with a local reference to measure distance. GPS is a receive-only system that uses relative timing measurements from several satellites (and the known positions of the satellites) to determine receiver position. Other range-finding applications involve two-way transmissions. A local station generates a pseudo random bit sequence and transmits it to the remote location (using any modulation technique). Some object at the remote location echoes this PN signal back to the location station – either passively, as in some kinds of radar and sonar systems, or using an active transponder at the remote location, as in the Apollo Unified S-band system.[4] By correlating a (delayed version of) the transmitted signal with the received signal, a precise round trip time to the remote location can be determined and thus the distance..

1. What property of PN code makes them suitable for use in spread spectrum communication?
Solution
Pseudo random noise is used in some electronic musical instruments, either by itself or as an
input to subtractive synthesis, and in many white noise machines.
In spread-spectrum systems, the receiver correlates a locally generated signal with the received
signal. Such spread-spectrum systems require a set of one or more "codes" or "sequences"
such that
Like random noise, the local sequence has a very low correlation with any other sequence in the
set, or with the same sequence at a significantly different time offset, or with narrow band
interference, or with thermal noise.
Unlike random noise, it must be easy to generate exactly the same sequence at both the
transmitter and the receiver, so the receiver's locally generated sequence has a very high
correlation with the transmitted sequence.
In a direct-sequence spread spectrum system, each bit in the pseudorandom binary sequence is
known as a chip and the inverse of its period as chip rate; comparebit rate and symbol rate.
In a frequency-hopping spread spectrum sequence, each value in the pseudo random sequence is
known as a channel number and the inverse of its period as thehop rate. FCC Part 15 mandates at
least 50 different channels and at least a 2.5 Hz hop rate for narrow band frequency-hopping
systems.
GPS satellites broadcast data at a rate of 50 data bits per second – each satellite modulates its
data with one PN bit stream at 1.023 million chips per second and the same data with another PN
bit stream at 10.23 million chips per second. GPS receivers correlate the received PN bit stream
with a local reference to measure distance. GPS is a receive-only system that uses relative timing
measurements from several satellites (and the known positions of the satellites) to determine
receiver position.
Other range-finding applications involve two-way transmissions. A local station generates a
pseudo random bit sequence and transmits it to the remote location (using any modulation
technique). Some object at the remote location echoes this PN signal back to the location station
– either passively, as in some kinds of radar and sonar systems, or using an active transponder at
the remote location, as in the Apollo Unified S-band system.[4] By correlating a (delayed version
of) the transmitted signal with the received signal, a precise round trip time to the remote
location can be determined and thus the distance.