antenna diversity


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antenna diversity

Using two or more receiving antennas on a wireless device to eliminate multipath signal distortion. Typically, the signal from the antenna with the least noise (best SNR) is chosen, and the other antenna is ignored. However, there are also methods that use incoming signals from both antennas. It is quite common to see two antennas on 802.11 wireless LAN access points and PC cards. See MIMO, beamforming, signal-to-noise ratio and multipath.


Antenna Diversity for 802.11
Note the dual antennas on the 802.11b access point (top left) and PC card (bottom) from Alvarion. Antenna diversity is an important feature of the 802.11 specification. (Image courtesy of Alvarion Ltd., www.alvarion.com)
References in periodicals archive ?
At Sprint's Technology Development he accessed and conducted proof-of-concept (POC) trials on a number of state-of-the-art technologies including 3G (CDMA2000), interference cancellation, antenna diversity and smart antennas.
The embedded chip level per-packet antenna diversity function enhances load balance and coverage.
Long range and multi-floor coverage - whole-home coverage with transmit beam forming and antenna diversity technology
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11a OFDM modem and per-packet antenna diversity technologies, they are uniquely positioned to deliver cost-effective, high throughput 802.
It delivers enhanced performance with antenna diversity support, co-channel rejection, superior SFN and C/N quality and high reliability (achieved from automotive quality certification AEC-Q100).
These include Transmit Beam Forming MIMO for increased range, TDM Scheduled MAC to support multiple clients with the appropriate QoS, channel aware rate selection for zero packet error rate, real time antenna diversity for robustness and interference resiliency based on adaptive interference detection, fast channel selection and dynamic 20/40MHz operation.
Utilizing the industry leading output power, receive sensitivity, transmit signal linearity, multipath tolerance and per packet antenna diversity of the SureFyre 802.
4GHz WiFi band, and integrates all of the RF Front End functions on a single silicon die (including support for transmit antenna diversity and 2x2 DL MIMO) with all of the passives (TX and RX filters and baluns) embedded in a 5mm x 5.
11a OFDM modem and per-packet antenna diversity technologies uniquely positions IceFyre to deliver a MIMO solution that cost effectively delivers the full performance promise of future high throughput 802.
Equipped with a special real-time antenna diversity scheme, it effectively prevents channel fading and radio fluctuations.