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Small Cell Solutions
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Introduction The Small Cell market is gearing up to support the need for greater coverage and ever increasing mobile broadband traffic. With respect to synchronisation requirements and depending on the timing architecture, the specifications for 3GPP air interface standards and relevant network interface standards must be met. High quality synchronisation is critical for the operation of the wireless access points over various operating conditions and over the lifetime of the equipment. While the technical requirements for Small Cells - the miniature mobile base station - remain identical to that of a macro base station, the cost structure of Small Cell equipment must be highly competitive. Rakon - Best for Service Providers, Best for Consumers Rakon's OCXOs and Ultra Stable TCXOs meet the frequency and timing requirements of Small Cell designers. Rakon oscillators independently maintain time and frequency accuracy for extended periods, providing better service availability at the network edge. Many Small Cell designs leverage PoE (Power over Ethernet) technology for the system's power supply - low power (20 mW) TCXOs contribute little to the overall power budget and are widely used. Pluto+™ Ultra Stable TCXO synchronisation solutions for Small Cells. Rakon's world class TCXOs are powered by in-house developed Pluto+™ technology, providing tight temperature stability (±50 - 100 ppb) enabling excellent frequency holdover. The very low phase noise performance (20 MHz, -130 dBc/Hz @100 Hz) ensures higher Quadrature Amplitude Modulation (QAM) rates with very little contribution to the Error Vector Magnitude (EVM). Rakon's advanced manufacturing facility uses high resolution temperature testing to screen crystals for activity dips. These test systems help produce TCXOs with excellent temperature sensitivity (as low as 10 ppb/°C) which is key in low loop bandwidth packet-based synchronisation applications like NTP and PTP. A key differentiator of Rakon's TCXOs is their patented tilt compensation technology. This keeps the TCXOs within frequency stability specification regardless of voltage control adjustments which are required for ageing compensation, and thus, long term operation of the equipment is guaranteed. The superior performance of Rakon's Pluto+™ based products enables development of the best price/performance, timing and Mercury+™ IC OCXO Rakon's Mercury™ and Mercury+™ technologies have made possible, the smallest (14 x 9 mm and 9x7 mm), lowest power consuming (350 mW) and most reliable (FIT of 30) OCXOs in the industry, with temperature stabilities between ±5 to ±50 ppb. The LTE-A and LTE-TDD Small Cells technologies require tight phase accuracies (1.5 ps) and applications like Location Based Services are driving the accuracy requirements to even more stringent values (~ 500 ns). Mercury+™ OCXOs enable Small Cell applications that require short phase holdover (15 minutes to 1 hour under limited ambient temperature excursions) but with much smaller size and lower power consumption than traditional OCXOs. Frequency and Phase Accuracy Requirement Frequency Why Rakon for Small Cells? For the system designer, Rakon's oscillators offer ease of integration and guaranteed consistency in performance, through: • Tight control of electrical parameters through high resolution testing in manufacture • A predictable, linear tuning range • Guaranteed performance for the life of the equipment New Zealand (HQ) Auckland | India Bangalore | Singapore Singapore City | China Shenzhen & Shanghai | Taiwan Taipei City | South Korea Seoul | United States Silicon Valley, Chicago & Atlanta | United Kingdom Harlow (London) | France Argenteuil (Paris), Mougins | Germany Frankfurt www.rakon.com

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#11 SMALL CELL FORUM MEMBER Impact of Linearisation on Small Cell Designs Linearisation turned OFF Rakon's TCXOs are fitted with a patented 3rd order compensation polynomial which will pre-distort the control signal to maintain the linearity across all control voltages and temperatures. As shown in the figure on the right hand side, the oscillator performs within specifications at extremes of the voltage control across the temperature range. This is a key differentiator between Rakon TCXOs and general purpose TCXOs. High Resolution Frequency Stability Over Temperature Testing to Avoid...

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Small Cell Solutions 2Pages

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Small Cell Solutions
2Pages