New Remote Radio Unit for WiMax Networks

8th December , 2008

Above : New Remote Radio Unit for WiMax Networks

Hong Kong : Comba Telecom Systems introduced its new WiMAX-compatible remote radio unit (RRU) to the global market. The RRU is a highly integrated base station  RF  unit  which  can  be  detached  from  the  BBU  (Base  Band  Unit)  and  fed  with  baseband  signals through  optical  fiber.  Its  high  power  efficiency  design  and  flexible  configuration  dramatically  reduces CAPEX and improves deployment time for WiMAX network rollout. 

A key feature of Comba’s RRU is that it is designed for easy customization for different BBU suppliers in order to expedite integration. The RRU supports point-to-point, star and daisy-chained connection with the BBU to provide a flexible system topology. 

In addition, it’s compact, IP65 weatherproof and convection cooling design allows it to operate in various environments  from  tower  tops  to  underground  tunnels.  These  flexible  and  scalable  design  features minimizes  the feeder  cable  requirements for  base  station  systems and mitigates the  challenges  network operators face in site acquisition and power supply issues. 

Mr. John Cheng, Comba’s Director of Product Marketing, Wireless Enhancement, said “We are pleased to bring  this  latest  innovation  to  the  market.  The  RRU  addresses  two  very  important  issues  of  the WiMAX space:  speed to market and cost effectiveness.” 

Cheng  further  added  “We  are  committed  to  helping  our  business  partners  and  customers  to  realize effective returns on their network investments. Comba is actively researching and developing products for current and developing standards such as UMTS, WiMAX and LTE. The WiMAX RRU is the latest addition to Comba’s RRU technology which includes solutions for WCDMA, CDMA2000 and TD-SCDMA.”

Key WiMAX RRU specifications:
·    Digital optical interface compliance with OBSAI RP3-01 v4.0 or CPRI v3.0
·    Customizable for third party BBUs (Base Band Units) 
·    Operates in 2.3-2.7GHz supporting variable channel bandwidths
·    RF performance exceeds specifications defined in the “WiMAX Forum System Profile”
·    Independent RF channels (TRx) support various multi-antenna architecture: 2x2 MIMO, 4xMIMO, 
·    SDR  (software  defined  radio)  enables  key  parameters  to  be  software  configurable  (central
frequency, channel bandwidth, output power, TDD ratio)
·    Support flexible system topology: point-to-point, star and daisy-chain
·    Built-in self-diagnostic, protection, alarm & error report functions
·    Compact size with minimal footprint facilitates rapid deployment

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