{"product_id":"iq-calibration-techniques-for-cmos-radio-transceivers-von-sao-jie-chen-yong-hsiang-hsieh","title":"IQ Calibration Techniques for CMOS Radio Transceivers","description":"\n                                \n                \u003cp\u003eIn the market of wireless communication, high data-rate transmission and high spectral efficiency have been the trend. The IEEE 802.11 a\/g standards working at 5GHz\/2.4GHz ISM bands can support data rate up to 54Mbits\/s using OFDM modulation. The newly proposed 802.11n technology now uses 64-QAM to achieve higher spectral efficiency. The DVB and many other systems will also use QAM for its data transmission.\u003c\/p\u003e\n                                \n                \n                \u003cp\u003eThe cost of achieving this higher spectral efficiency using higher order QAM is that the transmitter and receiver requires a higher signal to noise ratio (SNR) with the same level of error rate performance (relative to a baseline BPSK, QPSK and other systems). One of the dominant vectors on SNR degradation is I\/Q image rejection (I\/Q gains and phases imbalance).\u003c\/p\u003e\n                                \n                \n                \u003cp\u003eThere are a lot of factors that degrade the matching of gains and phases between I\/Q signals: the instinct layout mismatch, the random mismatch of the devices, the different temperatures over the I\/Q signal paths. IQ Calibration Techniques For CMOS Radio Transceivers describes a fully-analog compensation technique without baseband circuitry to control the calibration process. This book will use an 802.11g transceiver design as an example to give a detailed description on the I\/Q gains and phases imbalance auto-calibration mechanism.\u003c\/p\u003e\n                            \n            \u003cdiv class=\"aw-variant-hidden-subtitle-div\" id=\"aw-variant-subtitle-9781402050824\"\u003e\u003ch3\u003e\u003c\/h3\u003e\u003c\/div\u003e\u003cdiv class=\"aw-variant-hidden-subtitle-div\" id=\"aw-variant-subtitle-9789048172795\"\u003e\u003ch3\u003e\u003c\/h3\u003e\u003c\/div\u003e","brand":"Libri","offers":[{"title":"Hardcover - 9781402050824","offer_id":39521714831453,"sku":"9781402050824","price":106.99,"currency_code":"EUR","in_stock":true},{"title":"Softcover - 9789048172795","offer_id":39416684019805,"sku":"9789048172795","price":106.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0622\/files\/c8c88b83-d4ef-439d-9336-39e08e1c8ba2.jpg?v=1781417143","url":"https:\/\/shop.autorenwelt.de\/products\/iq-calibration-techniques-for-cmos-radio-transceivers-von-sao-jie-chen-yong-hsiang-hsieh","provider":"Autorenwelt Shop","version":"1.0","type":"link"}