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In order to solve the problems of high computational complexity, large amount of computing which semi-blind channel estimation algorithm based on subspace has for MIMO-OFDM system, the MIMO-OFDM semi-blind channel estimation algorithm based on the projection approximation subspace tracking (PAST) is proposed. The decomposition of signal subspace is(More)
This paper describes an easy adapted method of improving test coverage and effectiveness in an on-going industrial project by introducing and applying ’test type’ into test case design and execution. It presents comparison results of the number of system test item, effectiveness of test cases, and defect detection percentage between two(More)
The design of agricultural machinery navigation autopilot system for practical problems includes double RTK-DGPS receiver, navigation tracking controller, intelligent control terminal, the steering Angle sensor, automatic steering control valve group and other parts. According to the functional requirements, system adopts hierarchical control strategy,(More)
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