5G signal sources and simulation inside Spectre / Virtuoso

Dear sidm,

sidm said:

I am using IC618 & Spectre ISR20

do we have signal sources for 5G signal simulations inside Spectre / Virtuoso like there is a LTE source in RFLIB ?

A simple search on the Cadence On-line support portal provides the following recommendations to use as signal sources for 5G wireless simulations with spectreRF:

https://support.cadence.com/apex/ArticleAttachmentPortal?id=a1O3w000009bgZkEAI&pageName=ArticleContent

at the UNIX prompt, typing

$ spectre -h wsource

***************************
Independent Wireless Source
***************************

Wsource applies communications' standard-compliant modulation and is mainly
intended for use in wireless analysis. Assume that you have a modulated carrier
of the form, as shown below:
v(t) = Re{V(t)exp(j*2*pi*f0*t)}.
The complex envelope of v(t) is V(t) = I(t) + j*Q(t) and v(t) =
I(t)*cos(2*pi*f0*t) - Q(t)*sin(2*pi*f0*t).

A wsource operates in one of two modes:
1) The passband mode: In this mode, the output is the first harmonic complex
envelope V(t) = I(t) + j*Q(t).
2) The baseband mode: In this mode, the outputs are the baseband in-phase and
quadrature components I(t) and Q(t).

.....

or from the rf Library  user reference manual URL:

cadence.okta.com/.../saml

sidm said:

Also does ICADVM20 version offer any advantages over IC618 towards this direction  ?

I am sorry, but I can not provide any insight into your question as I have no idea of what you are trying to do. You might study the release notes for each version and determine any differences that are pertinent to your simulation objective(s).

Shawn

Dear sidm,

sidm said:

I am using IC618 & Spectre ISR20

do we have signal sources for 5G signal simulations inside Spectre / Virtuoso like there is a LTE source in RFLIB ?

A simple search on the Cadence On-line support portal provides the following recommendations to use as signal sources for 5G wireless simulations with spectreRF:

https://support.cadence.com/apex/ArticleAttachmentPortal?id=a1O3w000009bgZkEAI&pageName=ArticleContent

at the UNIX prompt, typing

$ spectre -h wsource

***************************
Independent Wireless Source
***************************

Wsource applies communications' standard-compliant modulation and is mainly
intended for use in wireless analysis. Assume that you have a modulated carrier
of the form, as shown below:
v(t) = Re{V(t)exp(j*2*pi*f0*t)}.
The complex envelope of v(t) is V(t) = I(t) + j*Q(t) and v(t) =
I(t)*cos(2*pi*f0*t) - Q(t)*sin(2*pi*f0*t).

A wsource operates in one of two modes:
1) The passband mode: In this mode, the output is the first harmonic complex
envelope V(t) = I(t) + j*Q(t).
2) The baseband mode: In this mode, the outputs are the baseband in-phase and
quadrature components I(t) and Q(t).

.....

or from the rf Library  user reference manual URL:

cadence.okta.com/.../saml

sidm said:

Also does ICADVM20 version offer any advantages over IC618 towards this direction  ?

I am sorry, but I can not provide any insight into your question as I have no idea of what you are trying to do. You might study the release notes for each version and determine any differences that are pertinent to your simulation objective(s).

Shawn

thanks for the reply.

I think the main issue we faced with the LTE source was that if we generate the signals at RF the noise floor was high unless the timestep is extremely small because the signal is at GHz.

If we generate the signal at baseband for the same timestep we get more points in the waveform and the noise floor was much lower. We can then shift the signal to RF using ideal mixers.

regards