The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper, a novel adaptive leakage suppression method (LSM) for ultra-high frequency radio frequency identification reader is proposed. The leaking power is reflected instead of absorbed to avoid saturating baseband circuits. The principle and application of this LSM based on selected power reflection actively controlled by digital baseband are discussed. The RF front-end is fabricated in a 0...
A new DC cancellation technique for a mixer-first receiver in UHF RFID reader is presented in this paper. A band-pass filter composed of an inductor and a capacitor is proposed to cancel the large DC component caused by the carrier leakage at the output of the passive mixer where the mixer is the input stage of the receiver to achieve a high 1dB compression point. Simulation results indicate that...
An area-efficient digitally-assisted DC canceling loop is presented for high sensitivity single-chip UHF RFID readers. The proposed loop suppresses the DC blocker in RFID receivers by 41 dB with the aid of negative feedback. A delta-sigma modulator with 67dB dynamic range is implemented in the loop to enhance the sensitivity of the receiver. A reconfigurable digital loop filter with low cut off frequency...
This paper focuses on synchronization of radio frequency identification (RFID) reader receivers, which plays a significant role for stability and efficiency of RFID systems. Performance of RFID reader suffers from a back-link-frequency variation of tags at a maximum of 22% according to widely used RFID standards. A new synchronization scheme employing timing recovery loop in RFID Reader Receivers...
A novel method of synchronization for RFID digital receiver is presented in this paper. The receiver can adaptively demodulate the burst mode receiving date from 31.2kHz to 780.8kHz and achieve fast synchronization and decoding, which is robust to plusmn2.5% frequency deviation within one frame. Meanwhile the power spectrum density of the receiving code is calculated and analyzed. The implementation...
A variable bandwidth high speed FIR filter for RFID Reader receiver is proposed. Variable bandwidth is achieved by providing different sample clock to the filter and high speed is obtained by substituting the multiplier; in the filter with segment look-up tables (LUTs) and inserting pipelines in adder's output stage. Final result shows that the filter can vary among three bandwidth; and its output...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.