Products
WiMAX RRH | RF Modules | Dual transceivers
Complete integrated Remote Radio Heads (RRH) for 2.5GHz and 3.5GHz WiMAX applications
The AxisNT family of Remote Radio Heads (RRH) is available immediately for OEM deployment in WiMAX networks worldwide. Versions covering UMTS/LTE applications will be available in early 2009.
Due to the use of our patented transceiver technology, Axis RRH exhibit excellent uplink and downlink performance to give customers the coverage and capacity edge. Typical Axis RRH sensitivity is better than -98dBm single channel and better than -100dBm for 2 channel MIMO. The downlink transmit powers of 2 x 8W (MIMO) in a RRH configuration (typically saving 3dB cable losses) are equivalent to a conventional BTS with 36W output. As a result, Axis convection cooled RRHs reduce the running costs and power consumption of a wireless network by 90%.
It is important to note that AxisNT technology can deliver 2 x 8W performance whilst still meeting the very demanding mandatory spectral requirements. This enables Axis RRHs to deliver a unique level of high power balanced link performance at significantly reduced CAPEX and OPEX when compared to conventional systems.
Product integration and branding
A standard RRH implementation involves a close cooperation between the customer and the AxisNT engineering team, to perform interoperability on the OBSAI and/or CPRI digital interface implementation. Products are available with a variety of interface connector options, with a single or dual fibre optic interface for up to 10km of FO cables, a choice of compact and lightweight packaging, and may have an optional customised solar shield. They are optimised for low power consumption and feature a wide input voltage range to provide flexibility in site installation. A built in handle and a variety of mounting brackets allow ease of installation. Additionally AxisNT will customise its RRH for the specific requirements of OEM customers, in respect of connectors, packaging and labels.
RRH applications, features and benefits
Key benefits compared to ground basestation architecture:
- Efficiency
- Basestations using distributed architecture with Radio Remote Head have an efficiency 50% superior to that of ground basestations
- Radio performance benefits
- Higher downlink power implies higher modulation and increase end-customers download capacity
- High receiver sensitivity allows higher uplink modulation and higher end-customers upload capacity
- More power allows flexibility in antenna types and patterns for better network planning
- Improve site cost (CAPEX)
- Fibre optic cables are much easier and cheaper to install
- Civil work and site construction considerably reduced
- Daisy chaining reduces cost further
- No air conditioning required
- Improved site operational cost (OPEX)
- Electricity bill estimated to the reduced by 40% reducing impact on environment
- Smaller basestation footprint and flexibility on the site location reduce considerably rental cost
- Flexibility of site deployment
- Sites with very long fibre optic cables are common, whereas RF cables are typically limited to less than 100m
- RRH can become indoor coverage distribution system
- Multiple air interface can be transmitted via one RRH using multi-carrier power amplifiers
RF Modules
The AxisNT family of single and dual RF Modules for 2GHz to 4GHz employ a multi-band architecture for TDD and FDD OEM applications using OFDMA, CDMA and TDMA technologies. The RF Module performs all the Tx/Rx analogue RF functions between the digital transceiver and the antenna ports. The RF power amplifiers are designed for integration with Digital Pre-Distortion (DPD), Quadrature Modulation Correction (QMC) and Crest Factor Reduction (CFR). Axis has deployed its RF Modules in OEM Remote Radio Heads for WiMAX and UMTS Base Station Systems.
Dual transceivers
The AxisNT family of Configurable Digital Radio Systems (CDRS) performs all the digital transceiver functions between the baseband IQ interface and the analogue RF front end, and is capable of operating over 400MHz to 4GHz. The CDRS is a multi-protocol, multi-band, digital radio for OEM applications delivering optimal cost, lowest power consumption and small size, and employs a flexible architecture for TDD or FDD applications using OFDMA, CDMA and TDMA technologies.
The CDRS has sufficient FPGA/PowerPC processing capacity and hardware interfaces to allow customer defined algorithms to be implemented. Axis can customise and/or license algorithms for:
- Digital Pre-distortion
- Quadrature Modulation Correction
- Crest Factor Reduction
- Envelope Tracking
- Power Control
- TDD Switching
- Integrated Adaptive Antenna Systems
- CDRS Management & Control
- CPRI, OBSAI or Custom baseband interface
