Innowireless Co., Ltd.

Junwan Park

Jinsoup Joung

Kyeongmin Ha

Seunghwan Ji

Cheoljin Lee

Jahon Koo

Byungkwan Jang

Disclosed herein are an apparatus and method for synchronizing a signal analyzer. The apparatus includes an Analog-to-Digital Converter (ADC), a signal storage unit, a trigger signal generation unit, a signal acquisition control unit, a signal analysis unit, and a time error control unit. The ADC converts the input signal into a corresponding digital signal. The signal storage unit stores therein the digital signal received from the ADC. The trigger signal generation unit generates a trigger signal for each predetermined period. the signal acquisition control unit acquires the digital signal from a signal acquisition time point. The signal analysis unit calculates the start position of a frame from the digital signal. The time error control unit calculates a time error between the time point at which each trigger signal is generated and the start position of the digital signal, and sets a subsequent signal acquisition time point based on the calculated time errors.

Apparatus and method for synchronizing signal analyzer

Disclosed herein is a dual processing system capable of ensuring real-time processing in a protocol conformance test. A protocol testing device performs a test on a layer under protocol test provided in a device under test. A communication device processes the protocol of a layer below the layer under protocol test between the device under test and the protocol testing device. The communication device processes a protocol test message, requiring real-time processing, instead of the protocol testing device, and transmits processing results for the protocol test message to the protocol testing device. The protocol testing device processes a protocol test message, not requiring real-time processing, and determines the conformance of the layer under protocol test provided in the device under test based on the processing results for the protocol test message.

Dual processing system capable of ensuring real-time processing in protocol conformance test

Disclosed herein is a method of acquiring Uplink (UL) synchronization for a mobile WiMax system analyzer. When a DL sub-frame is received, the method is performed on a Portable Subscriber Station (PSS) having a test mode function of creating a UL sub-frame through the mobile WiMax system analyzer having signal generating means configured to store the CID information in advance and signal analyzing means configured to receive and analyze the DL sub-frame. The method includes step (a) of the signal generating means continuously D/A converting, RF-modulating and outputting the DL sub-frame, step (b) of the signal analyzing means receiving the UL sub-frame, step (c) of the signal analyzing means continuously demodulating, A/D-converting and capturing the modulated UL sub-frame, and step (d) of the signal analyzing means acquiring UL synchronization by comparing the UL sub-frame with the data captured at step (c) using a time correlation technique.

Method of acquiring uplink synchronization for mobile WiMax system analyzer

Disclosed herein is a portable Internet analyzer (PIA) having a handover test function. The portable Internet analyzer includes a transmission unit, a reception unit, a switching unit, and a central control unit. The transmission unit encodes the various DownLink signals of a serving and/or target Base Station (stBS) using a preamble index, synthesizes the encoded signals, and sends the synthesized signals to a Portable Subscriber Station (PSS). The reception unit receives various UpLink (UL) signals from the PSS, and decodes the UL signals using the cell Parameters of the stBS. The switching unit selectively switches the transmission unit and the reception unit to the PSS. The central control unit generates various Media Access Control (MAC) messages to be sent to the PSS through the transmission unit in association with the handover test, analyzes handover test-related MAC messages received through the reception unit, and controls switching operation of the switching unit.

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Seoul, South Korea

Junwan Park