Nokia Mobile Phones Limited

Verkotan Oy

Pekka Jokitalo

Jussi Olavi Numminen

Jukka Kinnunen

Markku Lintinen

Juha Savolainen

Esa Nokkonen

Pertti Mäkikyrö

Jani Kallankari

Kari Komonen

The present invention discloses a test method and arrangement for testing GNSS signals within a test chamber. The test chamber inner walls are supplied with transmitting antennas supplying simulated satellite signals, originating from a signal generator. Dynamic satellite movements are simulated by interpolating several transmitted signals in order to create a single true satellite transmission signal. All visible satellites are taken into account in order to create simulated GPS signals across the whole virtual sky. Phantom objects may be used near the device under test and the phantom object may be moved or rotated in preset patterns within the test chamber. Radio channel information can be modelled according to several different real-life environments, and also reflections from any surfaces and different multipath options are taken into account in the modeling, and also in the transmission antenna angles towards the device under test. Main application areas of the invention comprise sports watches, health related or any other monitoring devices, or any devices benefiting from the positioning information, also relating to animal applications. The device may be carried or worn by the human user or any other living creature, as a wearable positioning device.

Testing method and arrangement for GPS positioning measurements

The invention pertains in general to the testing of the operation of radio and other data transmission apparatus. In particular the invention pertains to the testing of the operation of a digital radio apparatus on the basis of error statistics. In order to test functions relating to data transmission, a simulation system produces a pseudorandom bit sequence or some other test sequence which is packed into downlink frames and sent to the data transmission apparatus tested. In accordance with the invention, a known number of errors are generated in the test sequence. As the data transmission apparatus tested compares the received test sequence to the sequence it has produced, it detects the errors in the received sequence and compiles various error statistics, e.g., in the form of bit error ratio (BER) or frame erasure ratio (FER). An uplink connection is used to send these statistical data to the simulation system which examines whether the information produced by the data transmission apparatus tested matches the simulation system's information about the erroneousness of the sequence sent downlink.

Method and system for testing the functioning of a testing algorithm in a data transmission apparatus

The invention concerns a method and associated hardware units for testing the functioning of downlink data communication in a mobile station (). The mobile station is equipped for receiving () a signal in the downlink direction and for sending () a signal in the uplink direction. As a part of the method, a test signal () is received in the downlink direction. The received test signal is compared () to a known form of the test signal. There is produced and temporarily stored () information about errors which were detected in the received test signal during the comparing step. In the uplink direction a signal is sent () representing the stored information about errors.

Method and apparatus for measuring and optimising the quality of data transmission

To test the functioning of downlink data communication a mobile station comprises means ( ) for receiving a signal in the downlink direction and means ( ) for sending a signal uplink. It receives a test signal in the downlink direction ( ) and compares the received test signal to a known form of the test signal ( ). In addition, the mobile station stores information produced by the comparison about errors detected in the received test signal ( ) and sends uplink a signal representing the information stored ( ).

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Oulu, Finland

Pekka Jokitalo