DECT Intercom Network Device for Multipath Signal Correction
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Solution Overview
Problem
Existing network devices for intercom networks using the DECT protocol experience multipath interference, leading to signal degradation and potential communication disruptions due to superposition of radio signals along different paths, particularly in large halls and with multiple mobile devices.
Innovation Solution
Incorporation of signal correction devices, such as adaptive filters and equalizers, to prevent or reduce multipath interference by processing audio signals and selecting the best signal path, utilizing methods like the least-squares method and OFDM.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If radio signals are transmitted in a large solid angle range to ensure coverage, then communication coverage is improved, but multipath interference increases due to reflected signals
Solution Approach 1:
The patent converts the harmful multipath interference into a beneficial signal by using signal correction devices (equalizers, adaptive filters) to process the superimposed direct and reflected radio signals, extracting useful communication information from what would otherwise be destructive interference
Solution Approach 2:
Signal correction devices act as intermediaries between the received radio signals and the communication processing system, correcting the multipath-distorted signals before they reach the audio communication processing stage
2Reliability
If signal correction devices are added to reduce multipath interference, then signal quality is improved, but device complexity increases
Solution Approach 1:
The signal correction devices operate autonomously using algorithms (least-squares method, OFDM) that automatically adapt to the multipath environment without requiring manual configuration or external intervention, making the system self-correcting
Data Source
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AI summary
The invention relates, among other things, to a network device (10, 11, 12) for an intercom network (13) for enabling audio communication, in particular duplex audio communication, with other participants (14a, 14b, 14c, 14d, 14e, 14f) of the intercom network, comprising a housing (33) and a communication module (20a, 20b) arranged therein or thereon, with which a radio connection for transmitting audio signals to another participant can be established, wherein the radio connection is subject to the DECT protocol. A particular feature is that the network device (10, 11, 12) has a device (21) for preventing or reducing multipath interference.