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Comparison: StreamStar4 has multiple technological advantages over competing systems.

 

 

Quick Comparison
 
WiMAX 16e / LTE
CDMA / EVDO
StreamStar 4
Advanced Antenna Systems
2x, 4x MIMO
NONE (Single Antenna)
8x Digital Beamforming
Interference Cancellation
NONE
NONE
Spatial Nulling
Air Interface Technology
OFDMA
CDMA
Hybrid SCDMA+OFDMA
Native Voice
NONE (uses VoIP)
YES
YES
N=1 Deployment Capability
NONE
YES
YES
Net Spectral Efficiency @ N=3
1 b/s/Hz
0.8 b/s/Hz
2.8 b/s/Hz
Cell Breathing Problem
NO
YES
NO

 

Technical details: Comparison with WiMAX | Comparison with CDMA/EVDO | Comparison with LTE

 

StreamStar4 System Advantages:

Digital Beamforming (Smart Antennas)

StreamStar4 Smart Antenna system shapes the radio beam using 8 antennas working as one, thus significantly improving downlink and uplink gain and overall system performance. The range is significantly improved - beamforming gives as much as +18dB, a 64x power increase.

Beamforming also increases overall system efficiency. With more power available, the system has much higher probability of supporting higher modulation modes, thus increasing system capacity. Since RF energy is focused, less signals "leak" into neighboring cells, significantly reducing noise.

in WiMax and LTE, some implementations of MIMO are used, and some vendors claim that MIMO is beamforming. However, MIMO is much less effective than true beamforming in increasing system gain. MIMO is a multiple antenna technique, but MIMO is not - and will never be - a true beamforming algorithm. MIMO is very easy to do (802.11n MIMO is used in cheap Wi-Fi access points and routers) but ineffective in large-scale deployments. Beamforming on the other hand, is much more complex to achieve, but well worth the effort.

Hybrid Airlink (Air Interface) Technology

Our hybrid airlink is an optimal hybrid between SCDMA and OFDMA and takes advantage of both technologies, and has CDMA's superb intercell interference rejection, and OFDMA's excellent multipath performance. The hybrid air interface outperforms plain OFDMA (WiMax, LTE) and CDMA (CDMA2000, EVDO).

The hybrid air interface has the capability to deploy dense networks even with a single frequency channel - (N=1), a feat impossible in WiMAX and LTE.

Native Digital Voice, Messaging, Trunking

Voice is a very valuable, popular and revenue-generating service. It is imperative that a broadband wireless system supports voice as well as it does data. Voice is a integral part of our systems, and our Base Station equipment and terminals are fully voice-enabled without any 3-rd party devices.

Our systems support not only fully mobile voice and data, but also SMS - we have a range of desktop and mobile handsets that can send and receive SMS.

The voice subsystem also supports trunk services - such as push to talk (PTT) and broadcast. This allows the system to be used as an extremely efficient replacement for other trunk systems such as Walkie Talkie and TETRA.

Seamless Mobility

Our system has mobility built-in to the base stations themselves. Unlike WiMAX, there is no need for expensive and complicated ASN gateways, Mobile IP routers, or client software.

Smart L2 handoff ensures that sessions, IP addresses, VLAN tags - all are preserved even when terminals move from a base station to a base station or cell to cell.