ArrayComm delivers differentiating performance for 4G & 5G base stations, from small-cell to large-cell solutions. ArrayComm has leveraged its extensive real-world baseband software experience across a range of air interfaces, including LTE, LTE-A, Cat-M, NB-IoT and 5G wireless systems to develop powerful performance enhancing features, yielding best-in-class broadband wireless performance. A-MAS modules can be quickly integrated into most of the base station architectures for rapid time to market and cost-effective performance.
Infrastructure Products Overview
Downlink Beamforming – ArrayComm’s dynamically Active beamforming module is superior to simpler approaches such as beam switching or steering. Base station antenna signals are precisely weighted to optimize the combined signal to noise ratio at the target subscriber device. ArrayComm’s beamforming can be combined with Active interference cancellation (AIC) and MIMO transmission for additional performance gains. Average gains range from 6 to 8 dB, with peak gains far above that.
Uplink Active Interference Cancellation (AIC) Receivers – The ability to counteract undesired signals is a key benefit provided by ArrayComm. Dominant interfering signals are identified and “nulled” to produce a higher signal to interference plus noise ratio in the base station receive path. ArrayComm’s AIC can be combined with MIMO reception for additional performance gain. This A-MAS feature can enable overall link gains of 6 to 10 dB.
High Speed Train (HST) Receivers – Advanced PUSCH, PRACH and PUCCH receivers are able to estimate and compensation the high Doppler frequency offset introduced by high speed moving of train, as high 350km/hour for LTE and 500km/hour for 5G. ArrayComm’s HST Receivers can also receive signals from stationary users without loss.
RF Calibration – For downlink beamforming using uplink training on TDD networks, ArrayComm’s baseband software can “calibrate” the base station electronics between the baseband PHY and the antennas for better performance. The uplink and/or downlink antenna signals are precisely weighted to create a “reciprocal” channel having a figure of merit (downlink pointing gain over nulling gain) of 30 dB or more.
A-MAS for User Equipment
The smartphone revolution has established the mandate for ubiquitous,
high-speed data in wireless networks. ArrayComm delivers a superior user experience while minimizing network loading by employing efficient baseband processing software within the client device. Using ArrayComm’s industry-leading Active interference cancelation software, bandwidth consumption by data-hungry smartphones can be decreased by up to 50%, while increasing user throughput.
Virtually all LTE and LTE-A mobiles and CPEs have two receive antennas, which can also be used to support powerful, performance-enhancing Active Interference Cancelation (AIC). The AIC algorithm cancels out the most dominant interferer (from another base station), producing remarkable performance gains. Field trials have averaged 50%–100% downlink throughput gains in cell edge conditions. CPEs with more than two receive antennas can achieve higher gains. As 4G networks inevitably evolve to N=1 frequency reuse patterns to maximize capacity, user equipment will be challenged to perform in higher interference environments an increasing proportion of the time. AIC will play a key role in optimizing the user experience while network operators optimize spectrum efficiency.
ArrayComm’s AIC algorithm for user equipment is fully developed and tested in the field. This technology works equally well in FDD and TDD spectrum and delivers superior performance in both CDMA and OFDMA networks. Contact us to discuss how ArrayComm can apply this technology to help differentiate your device or chipset platform.