SOLAR SYSTEM

Detailed explanation-1: -Anti-jamming properties: The spread spectrum technique widens the bandwidth of the signal until it equals the original bandwidth plus the bandwidth of the pseudo-random noise injected. The pseudo-random noise added to the spread spectrum technique prevents jamming and interference in wireless systems.

Detailed explanation-2: -There are two predominant techniques to spread the spectrum: 1) Frequency hoping (FH), which makes the narrow band signal jump in random narrow bands within a larger bandwidth. 2) Direct sequence (DS) which introduces rapid phase transition to the data to make it larger in bandwidth.

Detailed explanation-3: -Spread spectrum signals are subject to the same jamming equations as any other signals, but the ability of the cooperative receiver to collapse the spectrum gives it a “processing gain” that reduces the effectiveness of the jamming.

Detailed explanation-4: -The definition of Spread – Spectrum modulation may be stated in two parts. 1. Spread Spectrum is a mean of transmission in which the data sequence occupies a BW (Bandwidth) in excess of the minimum BW necessary to transmit it.

Detailed explanation-5: -CDMA (also called spread spectrum multiple access) uses a pseudorandom code and operates in both time and frequency domains. It is effective against jamming techniques and is used primarily in military satellite communications.