enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Spread spectrum - Wikipedia

   en.wikipedia.org/wiki/Spread_spectrum

   Spread-spectrum techniques are used for the establishment of secure communications, increasing resistance to natural interference, noise, and jamming, to prevent detection, to limit power flux density (e.g., in satellite downlinks), and to enable multiple-access communications.

3. SATA Express - Wikipedia

   en.wikipedia.org/wiki/SATA_Express

   Host plug is used on motherboards and add-on controllers. This connector is backward compatible by accepting legacy standard SATA data cables, resulting in the host plug providing connectivity for up to two SATA devices. Host cable receptacle is the host-side connector on SATA Express cables. This connector is not backward compatible.

4. Code-division multiple access - Wikipedia

   en.wikipedia.org/wiki/Code-division_multiple_access

   CDMA is a spread-spectrum multiple-access technique. A spread-spectrum technique spreads the bandwidth of the data uniformly for the same transmitted power. A spreading code is a pseudo-random code in the time domain that has a narrow ambiguity function in the frequency domain, unlike other narrow pulse codes. In CDMA a locally generated code ...

5. CDMA spectral efficiency - Wikipedia

   en.wikipedia.org/wiki/CDMA_Spectral_Efficiency

   The aim of improving system spectral efficiency is to use limited radio spectrum resources and radio network infrastructure as efficiently as possible. The objective of radio-resource management is typically to maximize the system spectral efficiency under constraint that the grade of service should be above a certain level.

6. Chip (CDMA) - Wikipedia

   en.wikipedia.org/wiki/Chip_(CDMA)

   Orthogonal variable spreading factor (OVSF) is an implementation of code-division multiple access (CDMA) where before each signal is transmitted, the signal is spread over a wide spectrum range through the use of a user's code. Users' codes are carefully chosen to be mutually orthogonal to each other.

7. Channel access method - Wikipedia

   en.wikipedia.org/wiki/Channel_access_method

   The code-division multiple access (CDMA) scheme is based on spread spectrum, meaning that a wider radio channel bandwidth is used than the data rate of individual bit streams requires, and several message signals are transferred simultaneously over the same carrier frequency, utilizing different spreading codes.

8. Direct-sequence spread spectrum - Wikipedia

   en.wikipedia.org/.../Direct-sequence_spread_spectrum

   Direct-sequence spread-spectrum transmissions multiply the symbol sequence being transmitted with a spreading sequence that has a higher rate than the original message rate. Usually, sequences are chosen such that the resulting spectrum is spectrally white. Knowledge of the same sequence is used to reconstruct the original data at the receiving ...

9. Orthogonal frequency-division multiplexing - Wikipedia

   en.wikipedia.org/wiki/Orthogonal_frequency...

   In multi-carrier code-division multiple access (MC-CDMA), also known as OFDM-CDMA, OFDM is combined with CDMA spread spectrum communication for coding separation of the users. Co-channel interference can be mitigated, meaning that manual fixed channel allocation (FCA) frequency planning is simplified, or complex dynamic channel allocation (DCA ...