800 BPS vocoder implementation

Çetin, Doğu


2-20 MHZ band mixing down typr PLL frquency synthesizer.
Yurdayol, Ahmet; Department of Electrical Engineering (1978)
1kW Contactless Slip Ring Design Using Series-Series Resonant Converter Topology
Polat, Hakan; Keysan, Ozan; Department of Electrical and Electronics Engineering (2021-6-24)
Slip rings are often used in wound rotor synchronous machines to supply required field excitation during rotation. They mainly consist of carbon brushes and copper rings where the power transmission is achieved by constant friction, which results in mechanical wear over time. To eliminate the contact, brushless exciters are used. However, their low-speed operation is problematic. Therefore, in this thesis, the aim is to design a contactless slip-ring with improved fault tolerance to supply the required fiel...
15 W Power Amplifier Modules Using Coaxial Waveguide Combining by Planar Probes
Suna, Gonca; Eker, Taylan; Akkul, Mustafa; Incebacak, Mustafa; Demir, Şimşek; Yliditim, Nevzat (2014-07-11)
Power combining in coaxial waveguide by printed planar probes is investigated. Combiners are designed and implemented at 8-12 GHz and 15-18 GHz. Average introduced insertion loss is measured as 0.5 dB per branch. Power amplifier modules are designed and implemented for both bands. similar to 20 W output power at 8-12 GHz and similar to 12 W output at 15-18 GHz are achieved by efficient power combining.
8 x 4 SIW Power Divider and Slotted Array Antenna
Kiris, Orcun; Aydın Çivi, Hatice Özlem (2015-07-24)
An 8 x 4 substrate integrated waveguide (SIW) slotted SIW array is designed at 25 GHz to achieve -20 dB side lobe level (SLL). The slotted SIW array is designed monolithically integrated with a novel 1 x 8 power divider which provides -20 dB SLL Taylor distribution weights with uniform phase distribution. The desired SLL is obtained in simulated radiation pattern.
60 GHz PHY Performance Evaluation with 3D Ray Tracing under Human Shadowing
Genc, Zulkuf; Wim Van Thillo, Wim Van Thillo; Bourdoux, Andre; Onur, Ertan (2012-04-01)
This work evaluates the system-level performance of 60 GHz channels by simulating a realistic living room scenario with various numbers of humans and three different antenna configurations. In the first step, a comprehensive ray tracing study with a 3D ray tracing tool is performed to determine the channel impulse responses. Feeding our PHY simulator with the collected channel responses, the performance figures are generated over received SNR. It was observed that for a satisfactory BER performance, a direc...
Citation Formats
D. Çetin, “800 BPS vocoder implementation,” Middle East Technical University, 1998.