dc.description.abstract | Abstract
The market for cellphone is divided into 2 blocks. One provides the total solution communication chipsets called feature phone, and this kind of solutions is almost based on ARM7 with DSP core as MCU kernel. This belongs to the middle and low cost cellphone market. The other one uses the operation system such as MS mobile, Linux, and etc. This is called smart phone. This belongs to the high-price market cellphone. The structure for smartphone is based on one application processor as main chipset .This chipset control the peripheral such as Bluetooth, WIFI (802.11g), GPS and communication GSM/GPRS, 3G system chipset. This is why it increases the complexity, so the normal vendor will adopt the chipset which is mass-production or design by itself to decrease the development schedule. The purpose of this paper is to develop the module and compare the module performance with other vendor .This is to prove the performance for optimal solution. When we finish the first module then incoming version can continue adopting the module too. The module is helpful for speeding up to certify for cost down issue
The paper is developing for GSM/GSRS module ,including GSM850、GSM900,DCS1800 and PCS1900MHz, this is called as Quad-band using the Universal Asynchronous Receive & Transmit (or called UART) to connect (Hyper terminal)on PC systems simulating cellphone host system. The analysis details based on the ETSI spec.
The 1st chapter introduce GSM/GPRS system concept,GSM/GPRS information analysis, hardware structure and smart phone architecture. The second chapter introduces GSM/GPRS hardware module including RF, Baseband and communication interface. The third chapter explains GSM/GPRS module design and analysis method. Not only for handheld devices users care about RF signals quality, but also for indurate time, talking quality,these will effect the consumer to buy the product or not. So the fourth chapter integrates GSM/GPRS module performance testing and noise analysis as the main content. Voice source analysis is following the spec item for ETSI GSM30.07. This lets talking quality as in the best environment. The final chapter summarizes the experiment data for designing module as the final conclusion to meet the purpose of this paper. | en_US |