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Implementation And Rejection Of Interference In Bluetooth Voice Transmission Using Simulink

SKU: 010081

Rating: 

5

Bluetooth is a short-range wireless networking technology that allows easy interconnection of mobile computers, mobile phones, headsets, PDAs and computer peripherals such as printers, without the need for cables. It is designed to be low-cost and low form-factor, so much design work is required to optimize resource usage. Bluetooth uses the unlicensed Instrumentation, Scientific, and Medical (ISM) band around 2.4GHz. It shares this channel with devices used for other applications including cordless phones, garage door openers, highway toll transponders, and outside broadcasting equipment. It is also susceptible to interference from microwave ovens, which emit radiation in this bandwidth. There are two other wireless networking standards that use this frequency band, namely 802.11b or "WiFi" and Home RF. 802.11b uses direct sequence spread spectrum and Home RF uses the frequency hopping of 802.11 (a precursor to 802.11b) for data and the DECT cordless phone standard for voice. Many networking products based on these technologies are currently available. When designing Bluetooth systems and semiconductors, it is crucial to simulate and test them in the presence of interference from these other devices. System-level design tools like Simulink give engineers the capability to simulate the behavior of their devices and carryout such tests before commencing costly hardware and embedded software design. This allows the discovery of design flaws early in the development process while they are inexpensive to correct. The 366 data bits are transmitted at 1 Mbps and modulated using GFSK. GFSK effectively transmits +150 kHz signal relative to the carrier for a 1bit, and a -150kHz signal for a 0 bit. This functionality is implemented inside the ‘GFSK modulation and frequency hopping’ subsystem. The total system is design in simulink model and verifying the results

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